appfat.cpp: Fatal application errors.
    automap.cpp: Automap.
    capture.cpp: Screenshots.
    codec.cpp: Encoding and decoding of save files.
    control.cpp: UI controls.
    cursor.cpp: Mouse cursor actions.
    dead.cpp: Dead bodies on ground.
    debug.cpp: Debug functions.
    diablo.cpp: Main functions of the game.
    doom.cpp: The doom quest.
    drlg_l1.cpp: Dynamic random level generation of cathedral.
    drlg_l2.cpp: Dynamic random level generation of catacombs.
    drlg_l3.cpp: Dynamic random level generation of caves.
    drlg_l4.cpp: Dynamic random level generation of hell.
    dthread.cpp: Dungeon thread management.
    dx.cpp: DirectX initialization.
    effects.cpp: Sound effects.
    encrypt.cpp: MPQ encryption.
    engine.cpp: CEL decoding, PRNG, memory management.
    error.cpp: Error dialogues used by shrines.
    exception.cpp: Exception handling.
    gamemenu.cpp: Main game menu (e.g. single player, multi player).
    gendung.cpp: Dungeon generation utility functions.
    gmenu.cpp: In-game menu.
    help.cpp: Help screen.
    hero.cpp: Hero information.
    init.cpp: General initialization.
    interfac.cpp: Cut-scenes and progress bar interface.
    inv.cpp: Inventory.
    items.cpp: Items.
    lighting.cpp: Lighting effects.
    loadsave.cpp: Save file handling.
    mainmenu.cpp: Main menu.
    minitext.cpp: Medium-sized text rendering.
    missiles.cpp: Projectiles (e.g. arrow, firebolt).
    monster.cpp: Monsters.
    movie.cpp: Movie playback.
    mpqapi.cpp: MPQ functions.
    msg.cpp: Network messages.
    multi.cpp: Multi-player functions.
    nthread.cpp: Network thread management.
    objects.cpp: Objects (e.g. door, chest).
    palette.cpp: Colour palettes.
    path.cpp: Path finding.
    pfile.cpp: Player save file.
    player.cpp: Players (i.e. character/hero).
    plrmsg.cpp: Chat messages.
    portal.cpp: Town portals.
    quests.cpp: Quests.
    scrollrt.cpp: Drawing functions.
    setmaps.cpp: Place objects in quest areas.
    sha1.cpp: SHA1 hash algorithm.
    sound.cpp: Sounds.
    spell.cpp: Spells.
    stores.cpp: Stores (i.e. NPC item sales).
    sync.cpp: Network synchronization.
    themes.cpp: Dungeon themes (e.g. paintings on walls, armor stands).
    tmsg.cpp: Temporary network messages.
    town.cpp: Town rendering.
    towners.cpp: Town NPCs.
    track.cpp: Movement tracks.
    trigs.cpp: Dungeon triggers (e.g. stairways, red portal).
    wave.cpp: WAVE audio file parsing.
    world.cpp: Game world rendering.