id Software

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DOOM Source Release: The Portable Engine That Outlived Its Own Machine
DOOM Source Release: The Portable Engine That Outlived Its Own Machine
Inside `linuxdoom-1.10`, the split between system code and game code, the 35 Hz heartbeat, and the fixed-point tricks that made a 1993 shooter a permanent portability benchmark.
10 min read · May 19, 2026

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Quake-III-Arena
Quake III Arena GPL Source Release
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Quake
Quake GPL Source Release
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DOOM-3-BFG
Doom 3 BFG Edition
C++5.4k stars
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Quake-2
Quake 2 GPL Source Release
C3.3k stars
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wolf3d
The original open source release of Wolfenstein 3D
2.5k stars
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quake2-rerelease-dll
C2.2k stars
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DOOM-iOS
DOOM Classic for iOS Source Release
C836 stars
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wolf3d-browser
WOLF3D Browser Version GPL source release
JavaScript632 stars
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RTCW-SP
Return to Castle Wolfenstein Single Player GPL Source Release
C629 stars
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Enemy-Territory
Wolfenstein: Enemy Territory GPL Source Release
C616 stars
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Wolf3D-iOS
Wolfenstein 3D for iOS Source Release
C543 stars
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Quake-Tools
The source release of the Quake tools and utilities
513 stars
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RTCW-MP
Return to Castle Wolfenstein Multiplayer GPL Source Release
C378 stars
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Quake-2-Tools
Quake 2 Tools GPL Source Release
C344 stars
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DOOM-IOS2
Doom Classic for iOS version 2
C341 stars
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idsetup
This is the source for the setup program included with DOOM, Final DOOM, Strife, etc.
C310 stars
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quake-rerelease-qc
QuakeC296 stars
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GtkRadiant
GtkRadiant GPL Source Release
C++272 stars
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