emulator: EDuke32
type: standalone
core_classification: game_engine
source: "https://voidpoint.io/terminx/eduke32"
upstream: "https://voidpoint.io/terminx/eduke32"
profiled_date: "2026-10-04"
source_commit: "ec5824db81817866f70da326d3811bb0f52b3517"
core_version: "r11007"
display_name: "EDuke32"
cores: [eduke32]
systems: [duke3d, nam, napalm, ww2gi]

notes: |
  Build-engine port by TerminX, Hendricks266, Plagman and others. Covers
  Duke Nukem 3D (and its official addons), NAM, NAPALM, WWII GI and
  Platoon Leader. Startup scans the search path for registered GRPs by
  CRC32 (source/duke3d/src/grpscan.cpp:39-76 internalgrpfiles[]). Each GRP
  carries a game flag (DUKE / NAM / NAPALM / WW2GI) and optional addon
  dependency; EDuke32 picks the user selection, mounts it with
  initgroupfile and loads the DEF / CON / RTS the GRP points to.

  G_DefaultGrpFile (source/duke3d/src/common.cpp:60-73) returns the base
  GRP for the active game flag: DUKE3D.GRP, NAM.GRP, NAPALM.GRP, WW2GI.GRP.
  G_DefaultConFile and G_DefaultRtsFile pick EDUKE.CON / NAM.CON /
  NAPALM.CON / WW2GI.CON and DUKE.RTS / NAM.RTS / NAPALM.RTS / WW2GI.RTS.

  CRCs listed in source/duke3d/src/grpscan.h match the retail GRP byte
  for byte; the loader only checks CRC32 (not MD5) and only to pick the
  entry, never to refuse an unknown GRP. CON / RTS / addon files are
  referenced from the chosen entry but their contents are not validated.

  The scan checksums every *.grp, *.ssi, *.dat and *.zip file of the
  search path and matches size and CRC32 against the table; the table
  holds no file name (source/duke3d/src/grpscan.cpp:360-370, 486-492).
  An addon whose dependency is not found is removed from the list
  (source/duke3d/src/grpscan.cpp:503-517).

files:
  # ================================================================
  # Duke Nukem 3D (base game, GAMEFLAG_DUKE)
  # ================================================================

  - name: "DUKE3D.GRP"
    category: game_data
    system: duke3d
    required: false
    source_ref: "source/duke3d/src/common.cpp:36 (defaultgamegrp GAME_DUKE), source/duke3d/src/grpscan.cpp:41-50 (CRC-indexed variants)"
    note: >
      Any retail variant plays: Atomic Edition / Plus / World Tour
      (DUKE15_CRC 0xFD3DCFF1, 44356548 bytes, grpscan.h:35), v1.3D
      registered (DUKE13_CRC 0xBBC9CE44, 26524524 bytes, grpscan.h:33),
      Shareware v1.3D (DUKESW_CRC 0x983AD923, 11035779 bytes,
      grpscan.h:41), World Tour (DUKEWT_CRC 0x982AFE4A, grpscan.h:37),
      Plutonium Pak (DUKEPP_CRC 0xF514A6AC, grpscan.h:36), South Korean
      censored (DUKEKR_CRC 0xAA4F6A40, grpscan.h:34). CRC32 identifies
      the variant and selects the matching entry in internalgrpfiles[];
      no MD5 or SHA1 is read.

  - name: "EDUKE.CON"
    category: game_data
    system: duke3d
    required: false
    source_ref: "source/duke3d/src/common.cpp:38 (defaultgameconfilename GAME_DUKE)"
    note: "EDuke32 CON script. Shipped inside the GRP by default; external copy only when the user overrides it."

  - name: "DUKE.RTS"
    category: game_data
    system: duke3d
    required: false
    source_ref: "source/duke3d/src/grpscan.cpp:39-76 (rtsname field)"
    note: "Remote Ridicule speech. Not loaded if absent."

  # ---- Duke 3D addons ----

  - name: "DUKEDC.GRP"
    category: game_data
    system: duke3d
    required: false
    source_ref: "source/duke3d/src/grpscan.cpp:56-59 (Duke it out in D.C., GAMEFLAG_ADDON)"

  - name: "VACATION.GRP"
    category: game_data
    system: duke3d
    required: false
    source_ref: "source/duke3d/src/grpscan.cpp:60-64 (Duke Caribbean: Life's a Beach, GAMEFLAG_ADDON)"

  - name: "NWINTER.GRP"
    description: "Duke: Nuclear Winter"
    category: game_data
    system: duke3d
    required: false
    size: 16169365
    crc32: "f1cae8e4"
    validation: [size, crc32]
    source_ref: "source/duke3d/src/grpscan.cpp:65 (Duke: Nuclear Winter, GAMEFLAG_ADDON), 366 (crc and size compare), source/duke3d/src/grpscan.h:51 (DUKENW_CRC)"

  - name: "NWINTER.GRP"
    description: "Duke: Nuclear Winter Demo"
    category: game_data
    system: duke3d
    required: false
    size: 10965909
    crc32: "c7efbfa9"
    validation: [size, crc32]
    source_ref: "source/duke3d/src/grpscan.cpp:66 (Duke: Nuclear Winter Demo, GAMEFLAG_ADDON), 366 (crc and size compare)"
    note: "Addon of the Atomic Edition (dependency DUKE15_CRC); dropped from the list when that GRP is not found."

  - name: "DZ2.GRP"
    category: game_data
    system: duke3d
    required: false
    source_ref: "source/duke3d/src/grpscan.cpp:67-69 (Duke!ZONE II, GAMEFLAG_ADDON)"

  - name: "penthous.zip"
    description: "Duke Nukem's Penthouse Paradise"
    category: game_data
    system: duke3d
    required: false
    size: 2112419
    crc32: "7cd82a3b"
    validation: [size, crc32]
    source_ref: "source/duke3d/src/grpscan.cpp:70 (Penthouse Paradise, original .zip release), 366 (crc and size compare), 486-492 (scanned extensions)"
    note: "The original ZIP release, identified as a whole file by its size and CRC32. Addon of the Atomic Edition (dependency DUKE15_CRC)."

  - name: "PENTP.GRP"
    description: "Duke Nukem's Penthouse Paradise"
    category: game_data
    system: duke3d
    required: false
    size: 4247491
    crc32: "cf928a58"
    validation: [size, crc32]
    source_ref: "source/duke3d/src/grpscan.cpp:71 (Penthouse Paradise, ZOOM Platform repacked .grp), 366 (crc and size compare)"

  # ================================================================
  # NAM (GAMEFLAG_NAM)
  # ================================================================

  - name: "NAM.GRP"
    category: game_data
    system: nam
    size: 43448927
    required: false
    source_ref: "source/duke3d/src/grpscan.h:54 (NAM_CRC 0x75C1F07B), source/duke3d/src/grpscan.cpp:72"

  - name: "NAM.CON"
    category: game_data
    system: nam
    required: false
    source_ref: "source/duke3d/src/common.cpp:38 (defaultgameconfilename GAME_NAM)"

  # ================================================================
  # NAPALM (GAMEFLAG_NAM | GAMEFLAG_NAPALM)
  # ================================================================

  - name: "NAPALM.GRP"
    category: game_data
    system: napalm
    size: 44365728
    required: false
    source_ref: "source/duke3d/src/grpscan.h:55 (NAPALM_CRC 0x3DE1589A), source/duke3d/src/grpscan.cpp:73"

  - name: "NAPALM.CON"
    category: game_data
    system: napalm
    required: false
    source_ref: "source/duke3d/src/common.cpp:38 (defaultgameconfilename GAME_NAPALM)"

  # ================================================================
  # WWII GI (GAMEFLAG_WW2GI)
  # ================================================================

  - name: "WW2GI.GRP"
    category: game_data
    system: ww2gi
    size: 77939508
    required: false
    source_ref: "source/duke3d/src/grpscan.h:56 (WW2GI_CRC 0x907B82BF), source/duke3d/src/grpscan.cpp:74"

  - name: "WW2GI.CON"
    category: game_data
    system: ww2gi
    required: false
    source_ref: "source/duke3d/src/common.cpp:38 (defaultgameconfilename GAME_WW2GI)"

  - name: "PLATOONL.GRP"
    category: game_data
    system: ww2gi
    size: 37852572
    required: false
    source_ref: "source/duke3d/src/grpscan.h:57 (PLATOONL_CRC 0xD1ED8C0C), source/duke3d/src/grpscan.cpp:75 (Platoon Leader, GAMEFLAG_ADDON)"