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havoc-remaster/README.md
pyr0ball 198977ed2b feat: crack GRAFIX0N.DAT texture format + extractor 
WORLDS/GRAFIX0N.DAT is a big-endian (Mac-origin) tileset: an 8-byte header
(file size at 0x08, entry count at 0x0c), 16-byte entry records (BE offset +
id), and per-graphic blocks with a BE width/height/frames/id header followed by
w*h*frames 8-bit palette indices. Confirmed against the in-game loader at
0x444db0 (16-byte record stride, BE->LE dword swap).

GRAFIX00.DAT decodes to 29 graphics: explosion (id 901, 8 frames), smoke
(id 911, 8 frames), and 27 single-frame 64x64 structure/wall textures
(ids 8001-8028). tools/grafix_extract.py renders them to PNG with any
768-byte RGB palette (the XPAL palettes from INTRFACE.FF work).

- tools/grafix_extract.py: parser + PNG renderer
- docs/FORMATS.md: GRAFIX0N.DAT spec
- README: status update

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TN4Ytn3gdWRonNmHpisWQv
2026-07-03 09:36:41 -07:00

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Havoc — Preservation & Godot Remaster

Reverse-engineering, asset-extraction, and Godot remaster of Havoc (Reality Bytes, Inc., 1995) — a first-person vehicular-combat shooter for Windows 95/98.

Havoc renders a software-rasterized 3D world (textured terrain, low-poly enemy/pickup models, drivable and flyable vehicles, dithered 8-bit color) into a DirectDraw framebuffer, framed by an elaborate 2D cockpit HUD (mirrors, radar, gauges, weapon icons). Biomes include desert, snow/ice, lava, and ocean.

The original 32-bit executable (DirectDraw + DirectSound, no Direct3D — the 3D is all software) no longer runs reliably on modern Windows (legacy DirectDraw + a 16-bit installer/DirectX setup path). Rather than only emulate it, this project extracts the original data into open formats and rebuilds the game in Godot as a quality-of-life remaster.

Legal: Havoc is 30-year-old abandonware. This repository contains only original reverse-engineering code and documentation. It does not redistribute the game's executables, DLLs, or data files (see .gitignore). You must supply your own copy of the game data to run the tools.

Status

  • Identified binaries: HAVOC.EXE/LAUNCHER.EXE/SETUP.EXE are 32-bit PE (i386), DirectDraw + DirectSound, not 16-bit/DOS.
  • Cracked the .FF ("FlashFile") archive format — see docs/FORMATS.md.
  • Extracted MUSIC.FF: 97 WAV segments + 17 playlist-sequenced songs (verified correct).
  • FL Studio pack: per-song MIDI + sample mapping (tools/ff_extract.py --fl).
  • ogg/mp3 conversion (--convert, needs ffmpeg).
  • Boot HAVOC.EXE on Windows 11 (dgVoodoo2) — NOCD + copy-protection fix, see docs/PATCHES.md.
  • [~] Crack graphics formats: GRAFIX*.DAT done (docs/FORMATS.md); LAND*.DAT, MAP*.MAP, STUF*.DAT next.
  • Decompile HAVOC.EXE (Ghidra) to recover game logic.
  • Godot remaster project (widescreen, higher-res, rebindable input).

Tools

tools/ff_extract.py — extract any .FF archive.

python tools/ff_extract.py MUSIC.FF -o out_music --songs          # raw entries + assembled songs
python tools/ff_extract.py MUSIC.FF -o out_music --songs --convert ogg
python tools/ff_extract.py MUSIC.FF -o Havoc_MUSIC_FLStudio --fl  # FL Studio samples + MIDI

Layout

tools/        reverse-engineering & extraction scripts (tracked)
docs/         format documentation (tracked)
godot/        Godot remaster project (tracked, WIP)
<game files>  original data — supplied by you, gitignored