emulator: devilutionx
type: standalone
core_classification: game_engine
source: "https://github.com/diasurgical/DevilutionX"
upstream: ~
profiled_date: "2026-10-04"
source_commit: "dac104babfb6187415432f428ac2516747ffc154"
core_version: "1.6.0-dev"
display_name: "Diablo (DevilutionX)"
cores: [devilutionx]
systems: [diablo]
verification: md5

notes: |
  DevilutionX is a reimplementation of the Diablo 1 engine built from
  the leaked Diablo source. It plays the original retail Diablo and the
  Hellfire expansion from their shipped MPQ archives, or the shareware
  Spawn edition. The code loads MPQs from the game folder (next to the
  executable) and from a few platform-specific locations (XDG data home,
  macOS Application Support, etc.) via GetMPQSearchPaths().

  Load order is defined in Source/engine/assets.cpp:
    LoadCoreArchives() (:505)   - devilutionx.mpq, fonts.mpq (optional)
    LoadLanguageArchive() (:521) - <language code>.mpq, skipped for "en"
    LoadGameArchives() (:530)   - diabdat.mpq or spawn.mpq (required)
                                  hfbard.mpq, hfbarb.mpq (always probed)
    LoadHellfireArchives() (:570) - hellfire.mpq + hfmonk/hfmusic/hfvoice
    LoadModArchives() (:703)    - mods/<name>.mpq for each active mod

  diabdat.mpq is matched uppercase first ("DIABDAT.MPQ", GOG/retail CD
  convention, line 538), then lowercase (line 542); if neither is found
  the loader falls back to spawn.mpq (line 544). Missing BOTH triggers
  the "diabdat.mpq or spawn.mpq" InsertCDDlg dialog and the game cannot
  start.

  Hellfire is optional: the engine advertises Diablo even when hellfire
  files are absent. If hellfire.mpq is loaded, hfmonk.mpq + hfmusic.mpq
  + hfvoice.mpq must also be present (line 588) or the game aborts.

  devilutionx.mpq is a build artefact packed from the repo's assets/
  directory with the smpq tool (CMake option BUILD_ASSETS_MPQ,
  CMakeLists.txt:192-204). The compiled binary expects it next to the
  executable on every platform except Android, Apple and 3DS/Switch
  (:509-516), where its contents are shipped loose. After loading the
  core archives the engine reads the asset ASSETS_VERSION and aborts
  with "Failed to load UI resources" unless its content is "1\n"
  (Source/init.cpp:54, 79-85, Source/diablo.cpp:1225-1239). The same
  test on fonts\VERSION applies to fonts.mpq when it is loaded
  (Source/init.cpp:98-114).

  fonts.mpq is the CJK + language assets add-on from the
  devilutionx-assets release; English installs do not need it.

files:
  - name: diabdat.mpq
    path: devilutionx/diabdat.mpq
    system: diablo
    category: game_data
    required: true
    description: "Diablo retail or GOG MPQ (contains all game data)"
    aliases: [DIABDAT.MPQ]
    note: "primary game archive; GOG CD convention uses uppercase"
    source_ref: "Source/engine/assets.cpp:537-542"

  - name: spawn.mpq
    path: devilutionx/spawn.mpq
    system: diablo
    category: game_data
    required: false
    description: "Diablo shareware archive, used when diabdat.mpq is absent"
    note: "freely redistributable shareware; triggers gbIsSpawn mode"
    source_ref: "Source/engine/assets.cpp:544"

  - name: hellfire.mpq
    path: devilutionx/hellfire.mpq
    system: diablo
    category: game_data
    required: false
    description: "Hellfire expansion main archive"
    source_ref: "Source/engine/assets.cpp:573"

  - name: hfmonk.mpq
    path: devilutionx/hfmonk.mpq
    system: diablo
    category: game_data
    required: false
    description: "Hellfire monk class assets; mandatory when hellfire.mpq is present"
    source_ref: "Source/engine/assets.cpp:583"

  - name: hfmusic.mpq
    path: devilutionx/hfmusic.mpq
    system: diablo
    category: game_data
    required: false
    description: "Hellfire music; mandatory when hellfire.mpq is present"
    source_ref: "Source/engine/assets.cpp:584"

  - name: hfvoice.mpq
    path: devilutionx/hfvoice.mpq
    system: diablo
    category: game_data
    required: false
    description: "Hellfire voices; mandatory when hellfire.mpq is present"
    source_ref: "Source/engine/assets.cpp:585"

  - name: "hfbard.mpq"
    path: "devilutionx/hfbard.mpq"
    system: diablo
    category: game_data
    required: false
    description: "Hellfire bard class assets, loaded when present"
    source_ref: "Source/engine/assets.cpp:565"

  - name: "hfbarb.mpq"
    path: "devilutionx/hfbarb.mpq"
    system: diablo
    category: game_data
    required: false
    description: "Hellfire barbarian class assets, loaded when present"
    source_ref: "Source/engine/assets.cpp:566"

  - name: "devilutionx.mpq"
    path: "devilutionx/devilutionx.mpq"
    system: diablo
    category: game_data
    required: true
    description: "Engine assets (UI art, fonts, data tables, Lua scripts) packed from the repository's assets/ directory"
    note: "Loaded first on every platform except Android, Apple, 3DS and Switch. Its files are also found in an assets/ directory next to the binary when the build installs them loose. The engine aborts when the asset ASSETS_VERSION is absent or is not \"1\\n\"."
    source_ref: "Source/engine/assets.cpp:509-516, 223-226, Source/init.cpp:79-85, Source/diablo.cpp:1225-1239"

  - name: "fonts.mpq"
    path: "devilutionx/fonts.mpq"
    system: diablo
    category: game_data
    required: false
    description: "CJK and extended-language font pack from devilutionx-assets release"
    source_ref: "Source/engine/assets.cpp:517"

  - name: "es.mpq"
    path: "devilutionx/es.mpq"
    system: diablo
    category: game_data
    required: false
    description: "Spanish voice pack"
    note: "The archive named after the selected language code is loaded; English loads none."
    source_ref: "Source/engine/assets.cpp:521-528"

  - name: "pl.mpq"
    path: "devilutionx/pl.mpq"
    system: diablo
    category: game_data
    required: false
    description: "Polish voice pack"
    note: "The archive named after the selected language code is loaded; English loads none."
    source_ref: "Source/engine/assets.cpp:521-528"

  - name: "ru.mpq"
    path: "devilutionx/ru.mpq"
    system: diablo
    category: game_data
    required: false
    description: "Russian voice pack"
    note: "The archive named after the selected language code is loaded; English loads none."
    source_ref: "Source/engine/assets.cpp:521-528"

  - name: "hf.mpq"
    path: "devilutionx/mods/hf.mpq"
    system: diablo
    category: game_data
    required: false
    description: "Hellfire mod archive packed from the repository's mods/hf directory"
    note: "mods/<name>.mpq is opened for each active mod; hf is activated when hellfire.mpq is present. A mod with no archive and no loose directory is served from the core archives."
    source_ref: "Source/engine/assets.cpp:748-764, Source/options.cpp:77-79, CMakeLists.txt:204"