Free & Open Source FPS Games
341 free, open-source fps games — real clones and remakes you can download, inspect the source of, and modify. Not just free to play: the code itself is open.
Halted
Original game image
Original game imageClone of Wolfenstein: Enemy Territory
A hobby fork of the ET:XreaL id Tech 3 engine for Wolfenstein: Enemy Territory, adding bug fixes and updates.
Platforms:WindowsLinuxOSX
Stars27
Updated1 year ago
LicenseGPL-3.0
Release2020
Genre: FPS
Theme: World War II
Active
Original game image
Original game imageClone of Perfect Dark
A PSP port of Perfect Dark built from the PC port of the decompilation, playable start to finish at an N64-like framerate.
Stars27
Updated1 month ago
LicenseMIT
Release2025
Genre: FPS
Theme: —
Active
Clone of Call of Duty: Modern Warfare 2
Modern Warfare 2 for Xbox 360 recompiled to run natively on PC with campaign and multiplayer; bring your own disc.
Stars26
Updated1 month ago
LicenseGPL-3.0
Release2026
Genre: FPS
Theme: —
Active
Clone of Metroid Prime Hunters
A native Android port of the Metroid Prime Hunters recompilation, built for the dual-screen AYN Thor handheld.
Stars26
Updated2 months ago
LicenseGPL-3.0
Release2026
Genre: FPS
Theme: —
Active
Clone of Perfect Dark
An Original Xbox port of Perfect Dark built on the PC port, running at 480i, 480p or 720p with 4-player split-screen.
Stars26
Updated1 month ago
LicenseMIT
Release2026
Genre: FPS
Theme: —
Halted
Original game image
Original game imageClone of Shadow Warrior
3D Realms' official 2005 GPL source release of Shadow Warrior v1.2, the 1997 Build-engine shooter.
Sporadic
Clone of Ken's Labyrinth
A port of Ken's Labyrinth to modern Windows, macOS, Linux, and Switch homebrew, using OpenGL and SDL2 in place of the original DOS renderer.
Halted
Original game image
Original game imageClone of Quake 3
A Quake III engine project built on Quake3e, unifying classic Quake maps and mods with widescreen UI support; development has halted.
Sporadic
Halted
Active
Original game image
Original game imageClone of Star Wars: Dark Forces
A Nintendo 64 port of Dark Forces that builds a ROM from your own game files, needing the Expansion Pak.
Stars22
Updated1 month ago
LicenseGPL-2.0
Release2026
Genre: FPS
Theme: —
Halted
Clone of Quake 2
A port of the Berserker@Quake2 engine to SDL2 for Linux and Windows, requiring the player's own Quake II game data; no longer developed.
Halted
Active
Original game image
Original game imageClone of Doom 3
A source port reproducing vanilla Doom 3: BFG Edition on the modernized BFG engine, forked from RBDOOM-3-BFG before shadow mapping.
Halted
Original game image
Original game imageClone of Wolfenstein 3D
A modern SDL3 source port of the Macintosh version of Wolfenstein 3D for Windows, Linux, and macOS, supporting custom scenario packs.
Active
Clone of Star Trek: Voyager – Elite Force
A modified Quake III-based engine build for the Elite Force mod RPG-X2, with raised engine limits.
Active
Clone of Wolfenstein 3D
An open-source MonoGame reimplementation of Wolfenstein 3D for Windows and Linux, compatible with the shareware game data.
Halted
Halted
Original game image
Original game imageClone of Star Wars Jedi Knight: Jedi Academy
Raven Software and Activision's official 2003 GPLv2 source code release of Star Wars Jedi Knight: Jedi Academy, not a third-party remake.
HaltedOriginal game image
Original game imageClone of Shadow Warrior
A Shadow Warrior source port built on JFShadowWarrior, requiring the original game's data files.
Halted
Clone of Blake Stone: Planet Strike
A 2013 public release of Blake Stone: Planet Strike's source code by its original publisher; needs the commercial data files to run.
Halted
Sporadic
Original game image
Original game imageClone of Daikatana
Daikatana Restoration Project aims for a clean, compilable Daikatana 1.2 source release for modern systems, currently focused on Linux.
SporadicOriginal game image
Original game imageClone of Quake 3
An open-source engine reimplementation of Quake 3 versions 1.09-1.16n, built on ioquake3/ioEF, targeting Linux and macOS.
Active
Clone of Star Trek: Voyager – Elite Force
A native Android port of the Star Trek: Voyager - Elite Force single-player campaign; bring your own game data.
Sporadic
Active
Original game image
Original game imageClone of System Shock
An unofficial Android/ARM64 port of System Shock based on Shockolate, with handheld controls, tested on the Retroid Pocket 5.
Stars15
Updated2 months ago
LicenseGPL-3.0
Release2026
Genre: RPG
Theme: —
Active
Original game image
Original game imageClone of Alien Resurrection
An early recompilation launcher that builds a native version of PlayStation Alien Resurrection from your own disc.
Stars13
Updated1 month ago
LicenseUnknown
Release2026
Genre: FPS
Theme: —
Halted
Halted
Clone of Duke Nukem Forever
A mod project for Duke Nukem Forever (2011) adding a level/asset editor and aiming to fix up the base game, unaffiliated with Gearbox.
Halted
Original game image
Original game imageClone of Star Trek: Elite Force II
A maintenance update of the Star Trek: Elite Force II game source code, updated to compile under Visual Studio 2017 and on Linux.
Halted
Clone of Ken's Labyrinth
A port of Ken's Labyrinth to Android using SDL2 and OpenGL ES, adding touch controls and engine improvements.
Halted
Original game image
Original game imageClone of Kingpin: Life of Crime
The official modding SDK for Kingpin: Life of Crime, built on the Quake II engine, with source code and a model-conversion tool.
Active
Original game image
Original game imageClone of The World Is Not Enough
A native PC and Steam Deck port of 007: The World Is Not Enough with widescreen and modern controls, built from your own ROM.
Stars12
Updated1 month ago
LicenseUnknown
Release2026
Genre: FPS
Theme: —
Halted
Clone of Redneck Rampage
A free, open-source EDuke32/Build engine port for running the Redneck Rampage series with your own game data files.
Sporadic
Original game image
Original game imageClone of Virtua Cop 2
A work-in-progress reverse-engineering project for Virtua Cop 2 (1997 PC), including a browser-based asset explorer.
Archived
Active
Active
