Qwayk IV (Qwayk4)

A Quake 4–compatible engine fork of dhewm3 (Doom 3 GPL / id Tech 4).

Project goal

Ship a fully open-source drop-in engine replacement for Quake 4:

• Users point the engine at their existing Quake 4 install (Steam/GOG/DVD) and run the game without the original executable.
• The engine stays redistributable and engine-only (no Quake 4 assets and no Quake 4 SDK code included).
• Target parity: single-player, multiplayer, and mods.

Compatibility target

• Full Quake 4 game compatibility (campaign + multiplayer)
• Full Quake 4 mod compatibility (fs_game, custom maps, scripts, GUIs, add-on paks, and mod DLLs where feasible)
• Cross-platform support (Windows, Linux, macOS)
• Compatibility baseline: Quake 4 v1.4.2 behavior (via SDK reference)

Compatibility reference (required)

For Quake 4-specific interfaces/behavior and compatibility decisions, always consult the Quake 4 SDK located at:

E:\_SOURCE\_CODE\Quake4-1.4.2-SDK\

Status

This project is currently driven by the research/implementation plan in doc/Quake4_on_Dhewm3_Research.md.

Build (engine)

This repo uses CMake (source lives under neo/):

cmake -S neo -B build
cmake --build build

Docs

• AGENTS.md — contributor/agent guidance and compatibility stance
• doc/Quake4_on_Dhewm3_Research.md — research notes and implementation plan

Upstream credits

• dhewm3 — Doom 3 GPL source port and primary upstream base: https://dhewm3.org (code: https://github.com/dhewm/dhewm3)
• id Software — Doom 3 GPL source release (id Tech 4): https://github.com/id-Software/DOOM-3
• SDL2 — windowing/input layer (via dhewm3): https://www.libsdl.org/
• OpenAL Soft — audio output + EFX reverb (via dhewm3): https://openal-soft.org/

Additional third-party attributions remain in COPYING.txt and source headers.

If we use anything from the local reference project E:\_SOURCE\_CODE\Quake4Doom-master (an incomplete Quake 4-on-RBDOOM3 effort), add an explicit credit here and confirm license compatibility.

License

Engine code is GPL-licensed; see COPYING.txt.

Legal / trademark note

Quake 4 is a proprietary game; this repository does not include Quake 4 assets. You must own Quake 4 to run it.

This project is unofficial and is not affiliated with or endorsed by id Software, Raven Software, Activision, or ZeniMax.