docs/d2s_save_file_format_1.13d.html

<html>
<h1 align="center">Diablo II Save Game File Format</h1>
<h3 align="center">for Diablo II Expansion Set v1.13d</h3>
<div align="center">Updated July 1, 2012</div>
<p>This page was originally written by Trevin Beattie, whose site is no more (his latest version of this page is available
<a href="https://web.archive.org/web/20161224202623/http://web.archive.org/web/20070831101200/http://www.xmission.com/~trevin/DiabloIIv1.09_File_Format.shtml">here</a> though).<br/>
Now this page is maintained by me, Yuri Sakhno (George1).</p>
<h2>Introduction</h2>
<p>This page describes the format of saved game files for the game Diablo II Expansion Set v1.13d.
While the information presented here is mostly aplicable to earlier versions of the game, there were some drastic
changes in version 1.10 (particularly, in how character stats are saved), so if you intend to read files of the versions
of the game erlier than that, you would probably be better off opening that save in some recent version of the game and
then saving it again (upgrading the saved game file).</p>
<p><i>(Note: all values larger than a byte are stored in x86 little-endian order &#x2014;
i.e., least significant byte first. A &quot;<tt>short</tt>&quot; is 2 bytes long,
and a &quot;<tt>long</tt>&quot; is 4 bytes long. Values starting with &quot;0x&quot; are given
in hexadecimal notation; otherwise they are decimal.)</i></p>
<h2>File Header</h2>
<p>Each save file starts with a file header. Depending on the circumstances, this may be the only section present in saved game file.</p>
<table width="100%" border="1">
<tbody>
  <tr>
    <th width="8%">Byte Position</th>
    <th width="8%">Size</th>
    <th>Contents</th>
  </tr>
  <tr>
    <td align="middle">0</td>
    <td align="middle"><tt>long</tt></td>
    <td>File identifier. This must be the value <tt>0xAA55AA55</tt>.</td>
  </tr>
  <tr>
    <td align="middle">4</td>
    <td align="middle"><tt>long</tt></td>
    <td>File version. The following values are known:<br/>
      &#xA0;&#xA0;&#xA0; <tt>0x47</tt>&#xA0; v1.00 through v1.06<br/>
      &#xA0;&#xA0;&#xA0; <tt>0x57</tt>&#xA0; v1.07 or Expansion Set v1.08<br/>
      &#xA0;&#xA0;&#xA0; <tt>0x59</tt>&#xA0; standard game v1.08<br/>
      &#xA0;&#xA0;&#xA0; <tt>0x5C</tt>&#xA0; v1.09 (both the standard game and the Expansion Set.)<br/>
      &#xA0;&#xA0;&#xA0; <tt>0x60</tt>&#xA0; v1.10 and above<br/>
      As it was outlined above, this document only covers version <tt>0x60</tt> of the file format.</td>
  </tr>
  <tr>
    <td align="middle">8</td>
    <td align="middle"><tt>long</tt></td>
    <td>Size of the file, in bytes.</td>
  </tr>
  <tr>
    <td align="middle">12</td>
    <td align="middle"><tt>long</tt></td>
    <td>Checksum of the netire save file. If you attempt to hack the file without storing the
      correct checksum afterwards, your game will fail to load.
      Fortunately, the checksum algorithm is very simple.
      After clearing the checksum field, you add up the values of all the bytes
      in the file, rotating the running total one bit to the left before adding
      each byte. Then store the result in this field.</td>
  </tr>
  <tr>
    <td align="middle">16</td>
    <td align="middle"><tt>long</tt></td>
    <td>Active arms. Determines which weapon set is currently active.</td>
  </tr>
  <tr>
    <td align="middle">20</td>
    <td align="middle">16 <tt>char</tt>s</td>
    <td><a href="Random_Character_Names.html">Character name</a>. The name may be up to 15 characters long;
      the rest of the field must be padded with null-characters. <i>Remember the rules for
      Diablo II character names: 2-15 characters, containing only upper and
      lower case letters (A-Z), with the possible addition of one dash ( - ) or
      underscore ( _ ) as long as it is not the first or last character of the
      name.</i></td>
  </tr>
  <tr>
    <td align="middle">36</td>
    <td align="middle">byte</td>
    <td>
      <div>Character status. This is a bit field:</div>
      <table cellspacing="0" width="80%" align="center" border="1">
      <tbody>
        <tr>
          <th width="10%">7</th>
          <th width="10%">6</th>
          <th width="10%">5</th>
          <th width="10%">4</th>
          <th width="10%">3</th>
          <th width="10%">2</th>
          <th width="10%">1</th>
          <th width="10%">0</th>
        </tr>
        <tr>
          <td align="middle" colspan="2"><i>unknown</i></td>
          <td align="middle">Expansion<br/>Character</td>
          <td align="middle"><i>unknown</i></td>
          <td align="middle">Died</td>
          <td align="middle">Hardcore</td>
          <td align="middle" colspan="2"><i>unknown</i></td>
        </tr>
      </tbody>
      </table>
      <div><i>Note: the &quot;died&quot; bit indicates that your character
      has died at some point in the past. It is never cleared when you resume the game.
      To find out whether your character is currently dead, you need to look
      in the <a href="#item_list">item list</a> below to see if there is some corpse data.
      Obviously, if you have a hardcore character and this bit is set, you won't be able
      to play the game with that charcter anymore.</i></div></td>
  </tr>
  <tr>
    <td align="middle">37</td>
    <td align="middle">byte</td>
    <td>
      Character progression. This number tells (sort of) how many acts
      you have completed from all difficulty levels. It appears to be
      incremented when you kill the final demon in an act &#x2014; i.e., Andarial,
      Duriel, Mephisto, and Diablo / Baal. There's a catch to that last
      one: in an Expansion game, the value is <em>not</em> incremented after
      killing Diablo, but is incremented by 2 after killing Baal. (The
      reason is unknown.) So it skips the values 4, 9, and 14.
      <p>I believe this value is used in determining your character's
      title. The title is one of the following values (depending on the
      character class' gender):</p>
      <table border="0" align="center">
      <tbody>
        <tr>
          <th width="6%">Value</th>
          <th width="20%">Standard</th>
          <th width="20%">Hardcore</th>
          <th width="6%">Value</th>
          <th width="20%">Expansion</th>
          <th width="20%">Hardcode Expansion</th>
          <td width="8%" colspan="5"><!-- @ --></td>
        </tr>
        <tr>
          <td align="middle"><tt>0</tt>-<tt>3</tt></td>
          <td align="middle" colspan="2"><i>(no title)</i></td>
          <td align="middle"><tt>0</tt>-<tt>3</tt></td>
          <td align="middle" colspan="2"><i>(no title)</i></td>
        </tr>
        <tr>
          <td align="middle"><tt>4</tt>-<tt>7</tt></td>
          <td align="middle">Sir / Dame</td>
          <td align="middle">Count / Countess</td>
          <td align="middle"><tt>5</tt>-<tt>8</tt></td>
          <td align="middle">Slayer</td>
          <td align="middle">Destroyer</td>
        </tr>
        <tr>
          <td align="middle"><tt>8</tt>-<tt>11</tt></td>
          <td align="middle">Lord / Lady</td>
          <td align="middle">Duke / Duchess</td>
          <td align="middle"><tt>10</tt>-<tt>13</tt></td>
          <td align="middle">Champion</td>
          <td align="middle">Conqueror</td>
        </tr>
        <tr>
          <td align="middle"><tt>12</tt></td>
          <td align="middle">Baron / Baroness</td>
          <td align="middle">King / Queen</td>
          <td align="middle"><tt>15</tt></td>
          <td align="middle">Patriarch / Matriarch</td>
          <td align="middle">Guardian</td>
        </tr>
      </tbody>
      </table>
    </td>
  </tr>
  <tr>
    <td align="middle">38</td>
    <td align="middle">2 bytes</td>
    <td><i>unknown; probably some kind of padding</i></td>
  </tr>
  <tr>
    <td align="middle">40</td>
    <td align="middle">byte</td>
    <td>Character class. The defined classes are:<br/>
      &#xA0;&#xA0;&#xA0;&#xA0; <tt>0x00</tt>&#xA0; Amazon<br/>
      &#xA0;&#xA0;&#xA0;&#xA0; <tt>0x01</tt>&#xA0; Sorceress<br/>
      &#xA0;&#xA0;&#xA0;&#xA0; <tt>0x02</tt>&#xA0; Necromancer<br/>
      &#xA0;&#xA0;&#xA0;&#xA0; <tt>0x03</tt>&#xA0; Paladin<br/>
      &#xA0;&#xA0;&#xA0;&#xA0; <tt>0x04</tt>&#xA0; Barbarian<br/>
      &#xA0;&#xA0;&#xA0;&#xA0; <tt>0x05</tt>&#xA0; Druid (Expansion character only)<br/>
      &#xA0;&#xA0;&#xA0;&#xA0; <tt>0x06</tt>&#xA0; Assassin (Expansion character only)</td>
  </tr>
  <tr>
    <td align="middle">41</td>
    <td align="middle">2 bytes</td>
    <td><i>unknown; I've only seen the values { 16, 30 } here.</i></td>
  </tr>
  <tr>
    <td align="middle"><a name="header_level">43</a></td>
    <td align="middle">byte</td>
    <td>Character's level. This is the level shown on the character selection screen, but it
      should equal the level given in the <a href="#stats_level">character statistics</a> section.</td>
  </tr>
  <tr>
    <td align="middle">44</td>
    <td align="middle"><tt>long</tt></td>
    <td><i>unknown</i></td>
  </tr>
  <tr>
    <td align="middle">48</td>
    <td align="middle"><tt>long</tt></td>
    <td>Time stamp. This is in the standard <tt>time()</tt> format of the number
      of seconds which have elapsed since midnight, January 1, 1970 (UTC).</td>
  </tr>
  <tr>
    <td align="middle">52</td>
    <td align="middle"><tt>long</tt></td>
    <td><i>unknown</i></td>
  </tr>
  <tr>
    <td align="middle">56</td>
    <td align="middle">16 <tt>long</tt>s</td>
    <td>These are the <a href="Skills.html">skill Ids</a> assigned to the hotkeys for Skill&#xA0;1
      through Skill&#xA0;16. If a skill hotkey is not assigned to a skill, the value is <tt>0xFFFF</tt>.
      <p><!-- @ --></p>
      <div>Hotkey definitions are stored in the <tt><i>character</i>.key</tt>
      file. The structure of that file is not covered by this document.</div></td>
  </tr>
  <tr>
    <td align="middle"><a name="120">120</a></td>
    <td align="middle"><tt>long</tt></td>
    <td>The action assigned to the left mouse button. The value of this field is a <a href="Skills.html">skill Id</a>.</td>
  </tr>
  <tr>
    <td align="middle">124</td>
    <td align="middle"><tt>long</tt></td>
    <td>The action assigned to the right mouse button. The value of this field is also a <b>skill Id</b>.</td>
  </tr>
  <tr>
    <td align="middle">128</td>
    <td align="middle"><tt>long</tt></td>
    <td>In an Expansion character, the action assigned to the alternate left
      mouse button. (The button assignments are swapped when you swap weapons.)</td>
  </tr>
  <tr>
    <td align="middle">132</td>
    <td align="middle"><tt>long</tt></td>
    <td>In an Expansion character, the action assigned to the alternate right mouse button.</td>
  </tr>
  <tr>
    <td align="middle">136</td>
    <td align="middle">32 bytes</td>
    <td><i>unknown</i></td>
  </tr>
  <tr>
    <td align="middle">168</td>
    <td align="middle">3 bytes</td>
    <td>These bytes indicate which difficulty the character is playing.
      The first byte corresponds to Normal, the second Nightmare, and the third
      Hell. If the value is zero, the character is not playing at that
      level. Otherwise, the value looks like this:
      <table cellspacing="0" width="80%" align="center" border="1">
      <tbody>
        <tr>
          <th width="10%">7</th>
          <th width="10%">6</th>
          <th width="10%">5</th>
          <th width="10%">4</th>
          <th width="10%">3</th>
          <th width="10%">2</th>
          <th width="10%">1</th>
          <th width="10%">0</th>
        </tr>
        <tr>
          <td align="middle">Active</td>
          <td align="middle" colspan="4"><i>unknown</i></td>
          <td align="middle" colspan="3">Which Act the<br/>character is in (<tt>0</tt>-<tt>4</tt>)</td>
        </tr>
      </tbody>
      </table>
    </td>
  </tr>
  <tr>
    <td align="middle">171</td>
    <td align="middle"><tt>long</tt></td>
    <td>Map Id. This value looks like a random number, but it corresponds with one of the <tt>long</tt>s
      found in the <tt><i>character</i>.map</tt> file, according to the difficulty being played.</td>
  </tr>
  <tr>
    <td align="middle">175</td>
    <td align="middle"><tt>short</tt></td>
    <td><i>unknown</i></td>
  </tr>
  <tr>
    <td align="middle">177</td>
    <td align="middle"><tt>short</tt></td>
    <td>If your Expansion character has a mercenary who is currently dead, this field is non-zero.</td>
  </tr>
  <tr>
    <td align="middle">179</td>
    <td align="middle"><tt>long</tt></td>
    <td>This looks like a random Id for your mercenary. It is <tt>0</tt> if you have never had a mercenary.
      If your mercenary has died or (in the standard game) been left behind when you move on to the next act,
      this field is still set to the last mercenary you had.</td>
  </tr>
  <tr>
    <td align="middle"><a name="183">183</a></td>
    <td align="middle"><tt>short</tt></td>
    <td>This is a numerical index into the game's language-dependent string table for mercenary names.
      There is a separate list for each type of mercenary (Rogue Scout, Desert Mercenary, Eastern Sorceror,
      and Barbarian). Trevin wrote a <a href="Mercenaries.html">list of mercenary names</a> for the English 1.09 patch.</td>
  </tr>
  <tr>
    <td align="middle">185</td>
    <td align="middle"><tt>short</tt></td>
    <td>This code determines the difficulty level and act where your mercenary was found, as well as the attribute
      of your mercenary (i.e. Cold, Fire, Lightning). Trevin wrote a
      <a href="Mercenaries.html#code">list of the mercenary codes</a> appended to the end of the mercenary name.</td>
  </tr>
  <tr>
    <td align="middle">187</td>
    <td align="middle"><tt>long</tt></td>
    <td>Your mercenary's experience points.</td>
  </tr>
  <tr>
    <td align="middle">191</td>
    <td align="middle">144 bytes</td>
    <td><i>unknown</i></td>
  </tr>
</tbody>
</table>
<a name="new_character_small_file"><p>For the newly-created character, this is the only information present in the file (i.e. the file consists of just the header).
The save file is extended (all other sections added) when you exit the game (even if you haven't done anything in it),
but the very first save created by the game (i.e. right after you click the OK button on the character-creation screen)
will be the save with just the header present. Such a save is still a legitimate save, which the game can successfully load.</p></a>
<h2>Quest Completion Data</h2>
<p>The quest data begins with the following header:</p>
<table width="100%" border="1">
<tbody>
  <tr>
    <th width="10%">Byte Position</th>
    <th width="10%">Size</th>
    <th>Contents</th>
  </tr>
  <tr>
    <td align="middle">335</td>
    <td align="middle">4 <tt>char</tt>s</td>
    <td>The string identifier &quot;<tt>Woo!</tt>&quot;.</td>
  </tr>
  <tr>
    <td align="middle">339</td>
    <td align="middle">6 bytes</td>
    <td><i>unknown; there are values { <tt>0x06</tt>, <tt>0x00</tt>, <tt>0x00</tt>, <tt>0x00</tt>, <tt>0x2A</tt>, <tt>0x01</tt> } always present here.</i></td>
  </tr>
</tbody>
</table>
<p>The header is followed by three structures, one for each difficulty level. Note that the byte
offsets given here are offsets into the structure; the first structure is at offset 345 in the file,
the second one is at offset 441, and the third one at 537. You have to add the offsets from the table
to these values to get the actual offset in the file for the corresponding field for the specific difficulty level.</p>
<p>Although there is some variation in the meaning of the bits per quest, some of the bits appear to have constant meaning.</p>
<p>Bit 0 indicates the quest is complete. If bit 0 is not set but the rest of the field is non-zero,
then the quest has been started, but not finished.</p>
<p>Bit 1 generally means you have completed the requirements for the quest
(i.e., killed the boss demon), and all that's left is to collect the reward &#x2014;
for example, &quot;Charsi will imbue an item with magical power.&quot; Not all
quests have this option. If this bit is set, bit 0 must be cleared.</p>
<p>Bit 2 is often set when an NPC gives you a quest.</p>
<p>Bit 12 is set when you have seen the swirling fire animation that closes a quest icon.</p>
<p>Bit 13 indicates the quest was completed in the current game; when you save
the game and then reload it, all bit 13's are cleared.</p>
<table width="100%" border="1">
<tbody>
  <tr>
    <th width="10%">Byte Position</th>
    <th width="10%">Size</th>
    <th>Contents</th>
  </tr>
  <tr>
    <td align="middle">0</td>
    <td align="middle"><tt>short</tt></td>
    <td>This field contains a 1 if you have been introduced (by Warriv) to Act I.</td>
  </tr>
  <tr>
    <td align="middle">2</td>
    <td align="middle">6 <tt>short</tt>s</td>
    <td>
      <div>These fields contain quest completion data for each quest in Act I.</div>
      <table cellspacing="0" width="100%" align="center" border="1">
      <tbody>
        <tr>
          <th width="10%"><tt>short</tt>&#xA0;#</th>
          <th width="35%">Quest</th>
          <th width="55%">Notes</th>
        </tr>
        <tr>
          <td align="middle">0</td>
          <td>Den of Evil</td>
          <td>Bit 4 is set when you enter the Den.</td>
        </tr>
        <tr>
          <td align="middle">1</td>
          <td>Sisters' Burial Grounds</td>
          <td>Bit 4 is set when you enter the Burial Grounds.</td>
        </tr>
        <tr>
          <td align="middle">2</td>
          <td>Tools of the Trade</td>
          <td>Bit 6 is set when you pick up the Horadric Malus.</td>
        </tr>
        <tr>
          <td align="middle">3</td>
          <td>The Search for Cain</td>
          <td>Bit 4 is set when you enter Tristram.<br/>Bit 10 indicates
            whether you have completed the secret Cow Level (&quot;Moo&quot;). If
            you want to fight the Cow King again, just clear this bit!<br/>If you
            enter Act II without rescuing Deckard Cain, bit 14 will get
            set. You will not be able to rescue Cain yourself; the Rogues
            will have done it instead, and as a consequence, you will be charged
            a fee if you want Cain to identify items for you.</td>
        </tr>
        <tr>
          <td align="middle">4</td>
          <td>The Forgotten Tower</td>
          <td>Bit 2 is set when you read the Moldy Tome.<br/>Bit 6 is set when
            you enter the Forgotten Tower.</td>
        </tr>
        <tr>
          <td align="middle">5</td>
          <td>Sisters to the Slaughter</td>
          <td><!-- @ --></td>
        </tr>
      </tbody>
      </table>
    </td>
  </tr>
  <tr>
    <td align="middle">14</td>
    <td align="middle"><tt>short</tt></td>
    <td><i>uncertain; perhaps this gets set to a non-zero value after you travel from Act I to Act II.</i></td>
  </tr>
  <tr>
    <td align="middle">16</td>
    <td align="middle"><tt>short</tt></td>
    <td>This field contains a 1 if you have been introduced (by Jerhyn) to Act II.</td>
  </tr>
  <tr>
    <td align="middle">18</td>
    <td align="middle">6 <tt>short</tt>s</td>
    <td>
      <div>These fields contain quest completion data for each quest in Act II.</div>
      <table cellspacing="0" width="100%" align="center" border="1">
      <tbody>
        <tr>
          <th width="10%"><tt>short</tt>&#xA0;#</th>
          <th width="35%">Quest</th>
          <th width="55%">Notes</th>
        </tr>
        <tr>
          <td align="middle">0</td>
          <td>Radament's Lair</td>
          <td>Bit 4 is set when you find Radament.</td>
        </tr>
        <tr>
          <td align="middle">1</td>
          <td>The Horadric Staff</td>
          <td>Bit 4 is set when Cain tells you about the Viper Amulet.<br/>
            Bit 5 is set when Cain tells you about the Staff of Kings.<br/>
            Bit 10 is set when Cain tells you about the Horadric Staff.<br/>
            Bit 11 is set when you make the Horadric Staff.</td>
        </tr>
        <tr>
          <td align="middle">2</td>
          <td>Tainted Sun</td>
          <td>Bit 2 is set when the sun goes out.<br/>
            Bit 3 is set when Drognan tells you why.</td>
        </tr>
        <tr>
          <td align="middle">3</td>
          <td>Arcane Sanctuary</td>
          <td rowspan="2"><!-- @ --></td>
        </tr>
        <tr>
          <td align="middle">4</td>
          <td>The Summoner</td>
        </tr>
        <tr>
          <td align="middle">5</td>
          <td>The Seven Tombs</td>
          <td>Bit 3 is set when you talk to Tyrael.<br/>
            Bit 4 is set when you talk to Jerhyn (after killing Duriel).<br/>
            Bit 5 is set when you kill Duriel.<br/>
            Bit 6 is set when Atma congratulates you.<br/>
            Bit 7 is set when Warriv congratulates you.<br/>
            Bit 8 is set by Drognan.<br/>
            Bit 9 is set by Lysander.<br/>
            Bit 10 is set by Cain.<br/>
            Bit 11 is set by Fara.</td>
        </tr>
      </tbody>
      </table>
    </td>
  </tr>
  <tr>
    <td align="middle">30</td>
    <td align="middle"><tt>short</tt></td>
    <td><i>uncertain; perhaps this gets set to a non-zero value after you travel from Act II to Act III.</i></td>
  </tr>
  <tr>
    <td align="middle">32</td>
    <td align="middle"><tt>short</tt></td>
    <td>This field contains a 1 if you have been introduced (by Hratli) to Act III.</td>
  </tr>
  <tr>
    <td align="middle">34</td>
    <td align="middle">6 <tt>short</tt>s</td>
    <td>
      <div>These fields contain quest completion data for each quest in Act III.</div>
      <table cellspacing="0" width="100%" align="center" border="1">
      <tbody>
        <tr>
          <th width="10%"><tt>short</tt>&#xA0;#</th>
          <th width="35%">Quest</th>
          <th width="55%">Notes</th>
        </tr>
        <tr>
          <td align="middle">0</td>
          <td>Lam Esen's Tome</td>
          <td rowspan="2"><!-- @ --></td>
        </tr>
        <tr>
          <td align="middle">1</td>
          <td>Khalim's Will</td>
        </tr>
        <tr>
          <td align="middle">2</td>
          <td>Blade of the Old Religion</td>
          <td>Bit 2 is set when you pick up the Gidbinn.<br/>
            Bit 3 is set when Hratli asks you to find the Gidbinn.</td>
        </tr>
        <tr>
          <td align="middle">3</td>
          <td>The Golden Bird</td>
          <td>Bit 2 is set when Cain tells you about the Jade Figurine.<br/>
            Bit 4 is set when Cain tells you about the Golden Bird.<br/>
            Bit 5 is set when you are given the Potion of Life, and cleared again when you
            drink the Potion. (This prevents you from drinking more than one in a game.)<br/>
            Bit 6 is set when you find the Jade Figurine.</td>
        </tr>
        <tr>
          <td align="middle">4</td>
          <td>The Blackened Temple</td>
          <td rowspan="2"><!-- @ --></td>
        </tr>
        <tr>
          <td align="middle">5</td>
          <td>The Guardian</td>
        </tr>
      </tbody>
      </table>
    </td>
  </tr>
  <tr>
    <td align="middle">46</td>
    <td align="middle"><tt>short</tt></td>
    <td><i>uncertain; perhaps this gets set to a non-zero value after you travel from Act III to Act IV.</i></td>
  </tr>
  <tr>
    <td align="middle">48</td>
    <td align="middle"><tt>short</tt></td>
    <td>This field contains a 1 if you have been introduced to Act IV.</td>
  </tr>
  <tr>
    <td align="middle">50</td>
    <td align="middle">6 <tt>short</tt>s</td>
    <td>
      <div>These fields contain quest completion data for each quest in Act
      IV. Note that there are only three quests here, as opposed to 6 for
      the first three Acts.</div>
      <table cellspacing="0" width="100%" align="center" border="1">
      <tbody>
        <tr>
          <th width="10%"><tt>short</tt>&#xA0;#</th>
          <th width="35%">Quest</th>
          <th width="55%">Notes</th>
        </tr>
        <tr>
          <td align="middle">0</td>
          <td>The Fallen Angel</td>
          <td rowspan="3"><!-- @ --></td>
        </tr>
        <tr>
          <td align="middle">1</td>
          <td>Terror's End</td>
        </tr>
        <tr>
          <td align="middle">2</td>
          <td>Hell's Forge</td>
        </tr>
        <tr>
          <td align="middle">3-5</td>
          <td><i>unused</i></td>
          <td>It looks like quest data for Act IV still has place for 6 quests, despite the fact that this act only has 3.</td>
        </tr>
      </tbody>
      </table>
    </td>
  </tr>
  <tr>
    <td align="middle">62</td>
    <td align="middle"><tt>short</tt></td>
    <td><i>uncertain; perhaps this gets set to a non-zero value after you travel from Act IV to Act V in an Expansion game,
      <b>but this assumption has not been verified yet</b>.</i></td>
  </tr>
  <tr>
    <td align="middle">64</td>
    <td align="middle"><tt>short</tt></td>
    <td><i>unknown; in an Expansion character, this was set to 1 after
      completing Terror's End and talking to Cain in act IV</i>.</td>
  </tr>
  <tr>
    <td align="middle">66</td>
    <td align="middle">2 <tt>short</tt>s</td>
    <td><i>unknown</i></td>
  </tr>
  <tr>
    <td align="middle">70</td>
    <td align="middle">6 <tt>short</tt>s</td>
    <td>
      <div>These fields contain quest completion data for each quest in Act V.</div>
      <table cellspacing="0" width="100%" align="center" border="1">
      <tbody>
        <tr>
          <th width="10%"><tt>short</tt>&#xA0;#</th>
          <th width="35%">Quest</th>
          <th width="55%">Notes</th>
        </tr>
        <tr>
          <td align="middle">0</td>
          <td>Siege on Harrogath</td>
          <td>Bit 3 is set when you find Shenk.<br/>
            Bit 5 is set when Larzuk offers to socket an item for you.</td>
        </tr>
        <tr>
          <td align="middle">1</td>
          <td>Rescue on Mount Arreat</td>
          <td><!-- @ --></td>
        </tr>
        <tr>
          <td align="middle">2</td>
          <td>Prison of Ice</td>
          <td>Bit 7 is set when you read the Scroll of Resistance.<br/>
            Bit 8 is set after you rescue Anya and talk to Malah.</td>
        </tr>
        <tr>
          <td align="middle">3</td>
          <td>Betrayal of Harrogath</td>
          <td>Bit 4 is set when Anya offers to personalize an item for you.</td>
        </tr>
        <tr>
          <td align="middle">4</td>
          <td>Rite of Passage</td>
          <td><!-- @ --></td>
        </tr>
        <tr>
          <td align="middle">5</td>
          <td>Eve of Destruction</td>
          <td>Bit 4 is set when Larzuk congratulates you.<br/>
            Bit 5 is set when Cain congratulates you.<br/>
            Bit 6 is set when Malah congratulates you.<br/>
            Bit 7 is set by Tyrael.<br/>
            Bit 8 is set by Qual-Kehk.<br/>
            Bit 9 is set by Anya.</td>
        </tr>
      </tbody>
      </table>
    </td>
  </tr>
  <tr>
    <td align="middle">82</td>
    <td align="middle">7 <tt>short</tt>s</td>
    <td><i>unknown</i></td>
  </tr>
</tbody>
</table>
<h2>Waypoints Data</h2>
<p>The waypoints data begins with the following header:</p>
<table width="100%" border="1">
<tbody>
  <tr>
    <th width="10%">Byte Position</th>
    <th width="10%">Size</th>
    <th>Contents</th>
  </tr>
  <tr>
    <td align="middle">633</td>
    <td align="middle">2 <tt>char</tt>s</td>
    <td>The string identifier &quot;<tt>WS</tt>&quot;.</td>
  </tr>
  <tr>
    <td align="middle">635</td>
    <td align="middle">6 bytes</td>
    <td><i>unknown; there are values { <tt>0x01</tt>, <tt>0x00</tt>, <tt>0x00</tt>, <tt>0x00</tt>, <tt>0x50</tt>, <tt>0x00</tt> } always present here.</i></td>
  </tr>
</tbody>
</table>
<p>The header is followed by three structures, one per each difficulty level.
Note that the byte offsets given here are offsets into the structure; the first structure is at offset 641 in the file,
the second one is at offset 665, and the third at 689. You have to add the offsets from the table
to these values to get the actual offset in the file for the corresponding field for the specific difficulty level.</p>
<table width="100%" border="1">
<tbody>
  <tr>
    <th width="10%">Byte Position</th>
    <th width="10%">Size</th>
    <th>Contents</th>
  </tr>
  <tr>
    <td align="middle">0</td>
    <td align="middle">2 bytes</td>
    <td><i>unknown; there are values { <tt>0x02</tt>, <tt>0x01</tt> } always present here.</i></td>
  </tr>
  <tr>
    <td align="middle">2</td>
    <td align="middle">5 bytes</td>
    <td>Waypoints. This is a bitfield, with one bit assigned to each
      waypoint in LSB order &#x2014; so bit 0 in the Rogue Encampment waypoint for Act
      I. The first waypoint in every Act is activated as soon as you enter
      that Act. There are 9 waypoints (bits) in each of Acts I, II, and
      III, and 3 waypoints (bits) in Act IV, so the last waypoint before Diablo
      (River of Flame) is bit 29 (since we start counting from 0). The
      first waypoint for Act V follows at bit 30, and continues to the last
      (ninth) waypoint in Act V at bit 38.
      <p><!-- @ --></p>
      <div>The first waypoint in each of the difficulty levels is always activated,
      even if you have never been to that difficulty level.</div></td>
  </tr>
  <tr>
    <td align="middle">7</td>
    <td align="middle">17 bytes</td>
    <td><i>unknown</i></td>
  </tr>
</tbody>
</table>
<p>There is an additional byte value at file offset 713 after the three waypoints structures.
This byte always has value <tt>0x01</tt> and probably serves as some kind of trailer.</p>
<h2>NPC Introductions</h2>
<p>Trevin's data on the next section was very sketchy, and hasn't improved since at all.</p>
<table width="100%" border="1">
<tbody>
  <tr>
    <th width="10%">Byte Position</th>
    <th width="10%">Size</th>
    <th>Contents</th>
  </tr>
  <tr>
    <td align="middle">714</td>
    <td align="middle">2 <tt>char</tt>s</td>
    <td>The string identifier &quot;<tt>w4</tt>&quot;.</td>
  </tr>
  <tr>
    <td align="middle">716</td>
    <td align="middle">1 byte</td>
    <td><i>unknown</i></td>
  </tr>
  <tr>
    <td align="middle">717</td>
    <td align="middle">1 byte</td>
    <td>
      <div>You have been introduced to:</div>
      <table cellspacing="0" width="80%" align="center" border="1">
      <tbody>
        <tr>
          <th width="10%">7</th>
          <th width="10%">6</th>
          <th width="10%">5</th>
          <th width="10%">4</th>
          <th width="10%">3</th>
          <th width="10%">2</th>
          <th width="10%">1</th>
          <th width="10%">0</th>
        </tr>
        <tr>
          <td align="middle">Warriv</td>
          <td><!-- @ --></td>
          <td align="middle">Charsi</td>
          <td><!-- @ --></td>
          <td align="middle">Kashya</td>
          <td align="middle">Akara</td>
          <td align="middle">Gheed</td>
          <td><!-- @ --></td>
        </tr>
      </tbody>
      </table>
    </td>
  </tr>
  <tr>
    <td align="middle">718</td>
    <td align="middle">1 byte</td>
    <td>
      <table cellspacing="0" width="80%" align="center" border="1">
      <tbody>
        <tr>
          <th width="10%">7</th>
          <th width="10%">6</th>
          <th width="10%">5</th>
          <th width="10%">4</th>
          <th width="10%">3</th>
          <th width="10%">2</th>
          <th width="10%">1</th>
          <th width="10%">0</th>
        </tr>
        <tr>
          <td align="middle">Greiz</td>
          <td><!-- @ --></td>
          <td align="middle">Meshif</td>
          <td align="middle">Geglash</td>
          <td align="middle">Lysander</td>
          <td align="middle">Fara</td>
          <td align="middle">Drognan</td>
          <td><!-- @ --></td>
        </tr>
      </tbody>
      </table>
    </td>
  </tr>
  <tr>
    <td align="middle">719</td>
    <td align="middle">1 byte</td>
    <td>
      <table cellspacing="0" width="80%" align="center" border="1">
      <tbody>
        <tr>
          <th width="10%">7</th>
          <th width="10%">6</th>
          <th width="10%">5</th>
          <th width="10%">4</th>
          <th width="10%">3</th>
          <th width="10%">2</th>
          <th width="10%">1</th>
          <th width="10%">0</th>
        </tr>
        <tr>
          <td align="middle">Alkor</td>
          <td><!-- @ --></td>
          <td align="middle">Asheara</td>
          <td colspan="2"><!-- @ --></td>
          <td align="middle">Cain</td>
          <td><!-- @ --></td>
          <td align="middle">Elzix</td>
        </tr>
      </tbody>
      </table>
    </td>
  </tr>
  <tr>
    <td align="middle">720</td>
    <td align="middle">1 byte</td>
    <td>
      <table cellspacing="0" width="80%" align="center" border="1">
      <tbody>
        <tr>
          <th width="10%">7</th>
          <th width="10%">6</th>
          <th width="10%">5</th>
          <th width="10%">4</th>
          <th width="10%">3</th>
          <th width="10%">2</th>
          <th width="10%">1</th>
          <th width="10%">0</th>
        </tr>
        <tr>
          <td align="middle">Malah</td>
          <td align="middle">Anya</td>
          <td><!-- @ --></td>
          <td align="middle">Natalya</td>
          <td align="middle">Meshif</td>
          <td colspan="2"><!-- @ --></td>
          <td align="middle">Ormus</td>
        </tr>
      </tbody>
      </table>
    </td>
  </tr>
  <tr>
    <td align="middle">721</td>
    <td align="middle">1 byte</td>
    <td>
      <table cellspacing="0" width="80%" align="center" border="1">
      <tbody>
        <tr>
          <th width="10%">7</th>
          <th width="10%">6</th>
          <th width="10%">5</th>
          <th width="10%">4</th>
          <th width="10%">3</th>
          <th width="10%">2</th>
          <th width="10%">1</th>
          <th width="10%">0</th>
        </tr>
        <tr>
          <td colspan="5"><!-- @ --></td>
          <td align="middle">Cain</td>
          <td align="middle">Qual-Kehk</td>
          <td align="middle">Nihlathak</td>
        </tr>
      </tbody>
      </table>
    </td>
  </tr>
  <tr>
    <td align="middle">722</td>
    <td align="middle">3 bytes</td>
    <td><i>unknown</i></td>
  </tr>
  <tr>
    <td align="middle">725</td>
    <td align="middle">8 bytes</td>
    <td>Introductions repeated for Nightmare difficulty.</td>
  </tr>
  <tr>
    <td align="middle">733</td>
    <td align="middle">8 bytes</td>
    <td>Introductions repeated for Hell difficulty.</td>
  </tr>
  <tr>
    <td align="middle">741</td>
    <td align="middle">1 byte</td>
    <td>
      <p>It would appear that bits 1-6 of byte 741 get set after you take the
      caravan to Act II in Normal difficulty. Bit 7 of byte 741 through
      bit 1 of byte 743 get set after you sail to Act III. On entering Act
      IV, bits 2, 5, 6, &amp; 7 of byte 743 and bits 0, 3, &amp; 4 of byte 744
      get set.</p>
      <p>When you return to a previous act and talk to the NPC's, these bits are
      cleared.</p>
      <div>You have yet to be welcomed back by:</div>
      <table cellspacing="0" width="80%" align="center" border="1">
      <tbody>
        <tr>
          <th width="10%">7</th>
          <th width="10%">6</th>
          <th width="10%">5</th>
          <th width="10%">4</th>
          <th width="10%">3</th>
          <th width="10%">2</th>
          <th width="10%">1</th>
          <th width="10%">0</th>
        </tr>
        <tr>
          <td align="middle">Warriv</td>
          <td align="middle">?</td>
          <td align="middle">Charsi</td>
          <td align="middle">Warriv</td>
          <td align="middle">Kashya</td>
          <td align="middle">Akara</td>
          <td align="middle">Gheed</td>
          <td><!-- @ --></td>
        </tr>
      </tbody>
      </table>
    </td>
  </tr>
  <tr>
    <td align="middle">742</td>
    <td align="middle">1 byte</td>
    <td>
      <table cellspacing="0" width="80%" align="center" border="1">
      <tbody>
        <tr>
          <th width="10%">7</th>
          <th width="10%">6</th>
          <th width="10%">5</th>
          <th width="10%">4</th>
          <th width="10%">3</th>
          <th width="10%">2</th>
          <th width="10%">1</th>
          <th width="10%">0</th>
        </tr>
        <tr>
          <td align="middle">Greiz</td>
          <td align="middle">Jerhyn</td>
          <td align="middle">Meshif</td>
          <td align="middle">Geglash</td>
          <td align="middle">?</td>
          <td align="middle">Fara</td>
          <td align="middle">Drognan</td>
          <td align="middle">?</td>
        </tr>
      </tbody>
      </table>
    </td>
  </tr>
  <tr>
    <td align="middle">743</td>
    <td align="middle">1 byte</td>
    <td>
      <table cellspacing="0" width="80%" align="center" border="1">
      <tbody>
        <tr>
          <th width="10%">7</th>
          <th width="10%">6</th>
          <th width="10%">5</th>
          <th width="10%">4</th>
          <th width="10%">3</th>
          <th width="10%">2</th>
          <th width="10%">1</th>
          <th width="10%">0</th>
        </tr>
        <tr>
          <td align="middle">Alkor</td>
          <td align="middle">Hratli</td>
          <td align="middle">Asheara</td>
          <td colspan="2"><!-- @ --></td>
          <td align="middle">?</td>
          <td align="middle">?</td>
          <td align="middle">Elzix</td>
        </tr>
      </tbody>
      </table>
    </td>
  </tr>
  <tr>
    <td align="middle">744</td>
    <td align="middle">1 byte</td>
    <td>
      <table cellspacing="0" width="80%" align="center" border="1">
      <tbody>
        <tr>
          <th width="10%">7</th>
          <th width="10%">6</th>
          <th width="10%">5</th>
          <th width="10%">4</th>
          <th width="10%">3</th>
          <th width="10%">2</th>
          <th width="10%">1</th>
          <th width="10%">0</th>
        </tr>
        <tr>
          <td colspan="3"><!-- @ --></td>
          <td align="middle">?</td>
          <td align="middle">?</td>
          <td colspan="2"><!-- @ --></td>
          <td align="middle">Ormus</td>
        </tr>
      </tbody>
      </table>
    </td>
  </tr>
  <tr>
    <td align="middle">745</td>
    <td align="middle">4 bytes</td>
    <td><i>unknown</i></td>
  </tr>
  <tr>
    <td align="middle">749</td>
    <td align="middle">8 bytes</td>
    <td>Greetings repeated for Nightmare difficulty.</td>
  </tr>
  <tr>
    <td align="middle">757</td>
    <td align="middle">8 bytes</td>
    <td>Greetings repeated for Hell difficulty.</td>
  </tr>
</tbody>
</table>
<h2>Character Statistics</h2>
<p>The character statistics begin with 2-character identifier:</p>
<table width="100%" border="1">
<tbody>
  <tr>
    <th width="10%">Byte Position</th>
    <th width="10%">Size</th>
    <th>Contents</th>
  </tr>
  <tr>
    <td align="middle">765</td>
    <td align="middle">2 <tt>char</tt>s</td>
    <td>The string identifier &quot;<tt>gf</tt>&quot;.</td>
  </tr>
</tbody>
</table>
<p>From this point on, the contents of the file are variable, because character stats are stored in packed format
and certain stats may be absent (if the stat is absent in the save file, its value is 0.</p>
<p>Starting from patch version 1.10 Diablo II stores stats differently than it used to be in previous game version.
Every character stat is stored as a two-value pair. These pairs (and even the values inside them are not
byte-aligned. They may start in the middle of one byte, and continue to the second.
Here is the basic structure of the pair (note that field sizes are given in bits):</p>
<table width="100%" border="1">
<thead>
  <tr>
    <th align="middle" width="10%">Field Size</th>
    <th align="middle" width="90%">Description</th>
  </tr>
</thead>
<tbody>
  <tr>
    <td align="middle">9</td>
    <td>Stat Id. This field determines the stat whose value is stored in the value-pair and, more importantly,
      the size of the next field in the pair.</td>
  </tr>
  <tr>
    <td align="middle"><i>variable</i></td>
    <td>The value that is to be assigned to the corresponding stat. The size of the field, in bits,
      is determined by the stat itself. Read on to find out where this information can be obtained.</td>
  </tr>
</tbody>
</table>
<p>The stats list is terminated by the 9-bit value of <tt>0x1FF</tt> (all 9 bits are set),
i.e. the entire list is read in a loop, where you read the Id first and, if that Id is <tt>0x1FF</tt>,
you exit the loop, otherwise you read the next <i>n</i> bits as a stat value and repeat the loop.</p>
<p>The Ids of stats (and sizes of values) are determined by the data-tables normally stored inside
the game archive (the MPQ files). The file for this specific purpose is named <tt>ItemStatCost.txt</tt>,
which is a kind of CSV file, but with tabulation characters used as separators instead of commas.
The game actually uses the <tt>ItemStatCost.bin</tt> one, which is sort of a compiled version
of the corresponding text file.</p>
<p>Here is an Excel-formatted <a href="ItemStatCost.xlsx">ItemStatCost.xlsx</a> file that contains
the data for 1.13d patch with some nice formatting and extra comments. This file actually contains
data from two tables, the one needed for the purpose of reading character stats is given on the <b>ItemStatCost</b> sheet.</p>
<p>The column <b>ID</b> specifies the Id of the stat, as stored in the 9-bit field of the two-value pair.
The row containing that Id describes the stat. There is a textual name of the stat in the <b>Stat</b> column,
as well as the size of the value, in bits, that follows the Id in the two-value pair. This size is specified
by the <b>CSvBits</b> column. Only values that have value <b>1</b> in the <b>Saved</b> column (first 16 stats)
are actually saved in the character stats section of the save file.</p>
<p>The stats described by the <b>ItemStatCost</b> table are as follows (in table below Stat Name corresponds
to the value in the <b>Stat</b> column from the data table):</p>
<table width="100%" border="1">
<thead>
  <tr>
    <th width="10%">Stat Name</th>
    <th width="90%">Details</th>
  </tr>
</thead>
<tbody>
  <tr>
    <td align="middle">strength</td>
    <td rowspan="4">These stats are self-explanatory. They are always present.</td>
  </tr>
  <tr><td align="middle">energy</td></tr>
  <tr><td align="middle">dexterity</td></tr>
  <tr><td align="middle">vitality</td></tr>
  <tr>
    <td align="middle">statpts</td>
    <td>The number of Stat Points earned but not distributed.
      This stat may be absent from the save file if you have distibuted all stat points.</td>
  </tr>
  <tr>
    <td align="middle">newskills</td>
    <td>The number of Skill Choices earned but not distributed.
      This stat may be absent from the save file if you have distibuted all skill points.</td>
  </tr>
  <tr>
    <td align="middle">hitpoints</td>
    <td>Current amount of Life points.
      <p><!-- @ --></p>
      <div>These 6 stats are (usually) always present. (There is
      an exception: if your character is dead, the current Life stat will be
      gone!) <u>They are also <i>not</i> plain integer values!</u>
      Instead, each field is a fixed-point binary number, with a 24-bit integer
      part and an 8-bit fraction part. For example, if the Current Life
      stat contains the value 0x020AC0, then to get the amount of life
      remaining you take that value and divide by 256.0 to get 522.75
      (rounding the number to an integer for display. Note that the
      current amount of Life, Mana or Stamina may be more than the base amount,
      because the base does not take into account any blessings bestowed by
      magical items you are carrying.</div></td>
  </tr>
  <tr>
    <td align="middle">maxhp</td>
    <td>Base amount of Life points.</td>
  </tr>
  <tr>
    <td align="middle">mana</td>
    <td>Current amount of Mana points.</td>
  </tr>
  <tr>
    <td align="middle">maxmana</td>
    <td>Base amount of Mana points.</td>
  </tr>
  <tr>
    <td align="middle">stamina</td>
    <td>Current amount of Stamina points.</td>
  </tr>
  <tr>
    <td align="middle">maxstamina</td>
    <td>Base amount of Stamina points.</td>
  </tr>
  <tr>
    <td align="middle"><a name="stats_level">level</a></td>
    <td>Your character's level. This value must be in the range 1-99
      (and is therefore always present, even on a new character, with
      a <a href="#new_character_small_file">minor exception</a>) and should be
      the same as <a href="#header_level">byte 43</a> in the file header.</td>
  </tr>
  <tr>
    <td align="middle">experience</td>
    <td>The amount of experience your character has. If you haven't
      killed a single monster in the game, your experience will be 0, and this
      field is not stored. Otherwise, this field is always present.</td>
  </tr>
  <tr>
    <td align="middle">gold</td>
    <td>The amount of gold you are carrying with you (in your inventory or backpack).
      Just as a helpful reminder, the maximum amount of gold you may carry is directly
      proportional to your level, at 10,000 gold per level. Thus, a new character can only
      carry 10,000 gold pieces, but a level 99 character (the maximum) can carry nearly
      a million in gold (990,000).</td>
  </tr>
  <tr>
    <td align="middle">goldbank</td>
    <td>The amount of gold you have stowed away (in stash). Just as a helpful
      reminder, starting from the 1.13c patch onwards, the maximum amount of gold
      in your stash does not depend on your character's level, and is now a flat
      cap of 2,500,000 instead.</td>
  </tr>
</tbody>
</table>
<p>As it was specified above, the stats list is terminated with a stat Id with a special meaning
(the Id has value <tt>0x1FF</tt> in this case), and the stat value for this stat Id is not stored
(you may view it as a stat whose stat value is 0 bits in size). After that the remaining bits are
padded with 0-bits to the nearest byte-boundary so that the next section is byte-aligned.</p>
<h2><a name="skills">Character Skills</a></h2>
<p>The character skills section begins with the 2-character header,
&quot;<tt>if</tt>&quot;. This is followed by 30 bytes, each byte corresponding to
one of the character's special skills. To save space, Trevin listed the skills
in a <a href="Skills.html">separate table</a>.</p>
<h2><a name="item_list">Item List</a></h2>
<p>The next major section of the save file is the item list. It begins with the following header:</p>
<table width="100%" border="1">
<tbody>
  <tr>
    <th width="20%">Size</th>
    <th>Contents</th>
  </tr>
  <tr>
    <td align="middle">2 <tt>char</tt>s</td>
    <td>The string identifier &quot;<tt>JM</tt>&quot;.</td>
  </tr>
  <tr>
    <td align="middle"><tt>short</tt></td>
    <td>The number of items your character has. This includes items
      equipped, tucked in your belt, stored in your inventory, stored in your
      stash, and hidden in the Horadric Cube. It does <em>not</em>,
      however, include gems, runes, or jewels which have been inserted into a
      socketed item. (Those are counted as part of the item.)</td>
  </tr>
</tbody>
</table>
<p>This header is followed by a list of items. The format of the items is described
on the <a href="Item_Format.xhtml">Item Format</a> page.</p>
<p>After the list of items, you will find another item list header similar to
the one shown above; only this time the item count will be either 0 or 1. The value 0
means that your character is currently alive. If the value is 1, then that means
your character is dead (if you load this save, a corpse will be lying at your feet in town),
in which case 12 bytes of <i>(unknown)</i> data will follow, after which there will be
another items list header (the one with the identifier &quot;<tt>JM</tt>&quot; and item count)
and item list for items on your corpse. Sadly, the meaning of the 12 bytes is unknown.</p>
<p>If you have an Expansion character, then the corpse item list (if there is one) will be
followed by the 2-character identifier &quot;<tt>jf</tt>&quot;. If <em>and only
if</em> you have a mercenary (alive or dead), this header is followed by an item
list header and (possibly empty) item list containing items equipped on the
mercenary. This item list is followed by the 2-character trailer &quot;<tt>kf</tt>&quot;.</p>
<p>If you have a necromancer, it is possible for you to have an Iron Golem that
is preserved when your game is saved and restored. The Iron Golem is based on an
item. Following the mercenary item list, there will be a single byte that is <tt>0x00</tt>
if there is no golem, or <tt>0x01</tt> if there is. If there is a golem, this byte is
followed by a single item.</p>
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