Free & Open Source FPS Games

300 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.

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Yamagi Quake II Remaster

Clone of Quake 2

An experimental Yamagi Quake II fork adding Nightdive's Quake II remaster support and other id Tech-era game formats.

Platforms:WindowsLinuxOSX

Stars113

Updated11 days ago

LicenseUnknown

Release2023

Genre: FPS

Theme: Sci-Fi

Archived

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Rise of the Triad: Dark War

Clone of Rise of the Triad

Apogee's official 2002 GPL source release of Rise of the Triad: Dark War (v1.3), one of the earliest FPS games with rocket jumping and CTF.

Platforms:None

Stars111

Updated8 years ago

LicenseUnknown

Release2012

Genre: FPS

Theme: —

Halted

Gorc

Clone of Star Wars Jedi Knight: Dark Forces II

Gorc is an early-development open-source recreation of the Jedi Knight: Dark Forces II engine, aiming to run its levels on new platforms.

Platforms:None

Stars110

Updated5 years ago

LicenseApache-2.0

Release2013

Genre: Fighting

Theme: Fantasy

Halted

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HTML5 Wolfenstein 3D

Clone of Wolfenstein 3D

A browser-playable build of id Software/Bethesda's official HTML5 Wolfenstein 3D anniversary release, lightly modified to run here.

Platforms:Web

Stars108

Updated2 years ago

LicenseUnknown

Release2012

Genre: FPS

Theme: —

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Perfect Dark Decompilation

Clone of Perfect Dark

A complete matching decompilation of Rare's Perfect Dark for N64 that rebuilds a byte-identical ROM from your own copy.

Platforms:N64

Stars107

Updated1 month ago

Licensemit

Release2019

Genre: FPS

Theme: —

Halted

rottexpr

Clone of Rise of the Triad

An SDL2-based Rise of the Triad source port with new gameplay modes and high-res support.

Platforms:Windows

Stars107

Updated3 years ago

LicenseGPL-2.0

Release2017

Genre: FPS

Theme: —

Halted

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GloomAmiga

Clone of Gloom

The official source code for Gloom, an Amiga first-person shooter by Black Magic, released as-is with no completeness guarantee.

Platforms:Amiga

Stars104

Updated9 years ago

LicenseUnknown

Release2017

Genre: FPS

Theme: Sci-Fi

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Magic Carpet 2 HD

Clone of Magic Carpet 2

A C/C++ reverse-engineering of Magic Carpet 2 with HD rendering and WASD controls; the full campaign is playable on Windows and Linux.

Platforms:WindowsLinux

Stars102

Updated13 days ago

LicenseGPL-3.0

Release2020

Genre: FPS

Theme: Fantasy

Active

EDGE-Classic

Clone of Doom

A Doom source port reviving the older EDGE 1.35 engine with modern visuals, easy modding, and support for Heretic and other IWADs.

Platforms:Windows

Stars101

Updated25 days ago

LicenseGPL-3.0

Release2021

Genre: FPS

Theme: Sci-Fi

Active

lithtech

Clone of F.E.A.R.

An in-progress cross-platform source port built on the GPL LithTech engine, currently building the engine and No One Lives Forever 2.

Platforms:WindowsLinux

Stars101

Updated2 months ago

LicenseUnknown

Release2017

Genre: FPS

Theme: Horror

Sporadic

JonoF's Shadow Warrior Port (JFSW)

Clone of Shadow Warrior

JFSW is a source port of the original 1997 Shadow Warrior, built on the author's own Build engine port, first released in 2005.

Platforms:WindowsOSX

Stars100

Updated8 months ago

LicenseUnknown

Release2010

Genre: FPS

Theme: —

Halted

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64doom

Clone of Doom

A port of Doom to the Nintendo 64 via the libdragon toolchain, built from id Software's original source release; now marked halted.

Platforms:N64

Stars98

Updated2 years ago

LicenseUnknown

Release2015

Genre: FPS

Theme: Sci-Fi

Archived

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Descent II

Clone of Descent II

Parallax Software's original 1999 Descent II source release, missing third-party code so it won't compile as-is.

Platforms:Windows

Stars94

Updated14 years ago

LicenseUnknown

Release2012

Genre: FPS

Theme: Sci-Fi

Halted

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FQuake3

Clone of Quake 3

FQuake3 was an attempted F# implementation of Quake III Arena for 32-bit Windows, discontinued before reaching a playable state.

Platforms:Windows

Stars90

Updated11 years ago

LicenseGPL-2.0

Release2013

Genre: FPS

Theme: Sci-Fi

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three-descent

Clone of Descent

A browser-playable Three.js port of Descent, bundling shareware Episode 1 and supporting the full game with your own copy.

Platforms:Web

Stars89

Updated1 month ago

LicenseMIT

Release2026

Genre: FPS

Theme: Sci-Fi

Halted

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Serious-Sam-Android

Clone of Serious Sam: The Second Encounter

An Android port of Serious Sam Classic: The Second Encounter that runs using your own copy of the original game files.

Platforms:Android

Stars87

Updated2 years ago

LicenseUnknown

Release2019

Genre: FPS

Theme: —

Halted

The Catacomb Abyss

Clone of Catacomb 3-D

This repository holds the original source code for The Catacomb Abyss, compiling with Borland C++, released under the GNU GPLv2.

Platforms:DOS

Stars87

Updated12 years ago

LicenseGPL-2.0

Release2014

Genre: Action

Theme: Fantasy

Active

Iron Wolf

Clone of Wolfenstein 3D

A from-scratch Rust recreation of Wolfenstein 3D, bundling the shareware version and offering a browser-playable web build.

Platforms:Web

Stars85

Updated20 days ago

LicenseGPL-3.0

Release2021

Genre: FPS

Theme: —

Sporadic

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NakedAVP

Clone of Aliens Versus Predator

An SDL3 source port of Aliens Versus Predator Gold for Windows, macOS and Linux; needs the original game data.

Platforms:WindowsLinuxOSX

Stars84

Updated7 months ago

LicenseUnknown

Release2022

Genre: FPS

Theme: Sci-Fi

Sporadic

No One Lives Forever Modernizer

Clone of The Operative: No One Lives Forever

A Windows patch for No One Lives Forever that fixes bugs, restores multiplayer and adapts the game to modern resolutions.

Platforms:Windows

Stars83

Updated8 months ago

LicenseUnknown

Release2019

Genre: FPS

Theme: Comedy

Halted

Phoenix DOOM

Clone of Doom

A remaster of the 3DO version of DOOM for Windows, macOS and Linux, based on its official source release.

Platforms:WindowsLinuxOSX

Stars80

Updated6 years ago

LicenseMIT

Release2019

Genre: FPS

Theme: Sci-Fi

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Goldeneye 007

Clone of GoldenEye 007

A work-in-progress decompilation of GoldenEye 007 for N64, rebuilding the NTSC-U, Japanese, and PAL ROMs against checksum verification.

Platforms:N64

Stars71

Updated1 month ago

LicenseUnknown

Release2016

Genre: FPS

Theme: —

Sporadic

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LTJS

Clone of No One Lives Forever 2

LTJS is a work-in-progress source port of the LithTech Jupiter engine, currently supporting No One Lives Forever 2 (version 1.3).

Platforms:Windows

Stars70

Updated5 months ago

LicenseUnknown

Release2014

Genre: FPS

Theme: Espionage

Sporadic

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TurboQuake

Clone of Quake

TurboQuake is a fork of Quake's source code optimized for older x86 hardware, with restored MS-DOS support.

Platforms:WindowsLinuxDOS

Stars64

Updated4 months ago

LicenseUnknown

Release2021

Genre: FPS

Theme: Fantasy

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Q2REPRO

Clone of Quake 2

Q2REPRO is a Q2PRO fork built as a drop-in replacement for the official Quake II re-release engine.

Platforms:WindowsLinux

Stars63

Updated29 days ago

LicenseGPL-2.0

Release2023

Genre: FPS

Theme: Sci-Fi

Archived

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Blood II: The Chosen

Clone of Blood II: The Chosen

This repository contains the officially released LithTech-engine source code for Blood II: The Chosen, released by Monolith.

Platforms:Windows

Stars62

Updated12 years ago

LicenseUnknown

Release2014

Genre: FPS

Theme: Sci-Fi

Halted

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SiN Gold Game Source

Clone of SiN

Night Dive Studios' official source release of SiN Gold, the 1998 Ritual Entertainment shooter built on a modified Quake II engine.

Platforms:Windows

Stars62

Updated6 years ago

LicenseUnknown

Release2020

Genre: FPS

Theme: Sci-Fi

Halted

Iron Doom

Clone of Doom

Iron Doom is a Doom source port written in Rust on the Chocolate Doom codebase, using Bevy's ECS to fix engine bugs.

Platforms:WindowsLinuxOSX

Stars59

Updated1 year ago

LicenseGPL-3.0

Release2024

Genre: FPS

Theme: Sci-Fi

Sporadic

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vitaRTCW

Clone of Return to Castle Wolfenstein

A PS Vita port of id Software's open-source Return to Castle Wolfenstein single-player release.

Platforms:PSVita

Stars59

Updated4 months ago

LicenseGPL-3.0

Release2018

Genre: FPS

Theme: Sci-Fi

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Alien Breed 3D II The Killing Grounds

Clone of Alien Breed 3D II: The Killing Grounds

An actively maintained rebuild of the Alien Breed 3D II: The Killing Grounds engine, compatible with original game data or mods.

Platforms:Amiga

Stars57

Updated13 days ago

LicenseUnknown

Release2022

Genre: FPS

Theme: Horror

Sporadic

Lilium Voyager

Clone of Star Trek: Voyager – Elite Force

An open-source engine reimplementation of Star Trek: Voyager - Elite Force's Holomatch mode, built on the ioquake3-derived ioEF engine.

Platforms:WindowsLinuxOSX

Stars57

Updated4 months ago

LicenseGPL-2.0

Release2017

Genre: FPS

Theme: Sci-Fi

Sporadic

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Taradino

Clone of Rise of the Triad

A source port of Rise of the Triad (1994) for modern Linux, Windows, and macOS, with 64-bit and big-endian support.

Platforms:WindowsLinuxOSX

Stars57

Updated6 months ago

LicenseGPL-2.0

Release2021

Genre: FPS

Theme: —

Halted

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Heretic

Clone of Heretic

Raven Software's official release of the Heretic source code, published for learning and modification; the DMX sound library is excluded.

Platforms:DOS

Stars54

Updated13 years ago

LicenseGPL-2.0

Release2013

Genre: FPS

Theme: Fantasy

Archived

No preview

Macintosh Wolfenstein 3D Source Code

Clone of Wolfenstein 3D

The original 1994 Wolfenstein 3D source code for classic Mac OS, released by Interplay Productions under license from id Software.

Platforms:Classic Mac OS

Stars52

Updated12 years ago

LicenseUnknown

Release2013

Genre: FPS

Theme: —

Halted

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OpenNitemare3D

Clone of Nitemare 3D

A partial C# reimplementation of the 1994 FPS Nitemare 3D that loads the original maps, images and music.

Platforms:Windows

Stars51

Updated4 years ago

LicenseGPL-3.0

Release2019

Genre: FPS

Theme: Horror

Sporadic

No One Lives Forever 2 Modernizer

Clone of No One Lives Forever 2

A Windows mod for No One Lives Forever 2 adding widescreen, anti-aliasing, a rewritten input system and crash fixes.

Platforms:Windows

Stars49

Updated7 months ago

LicenseUnknown

Release2019

Genre: FPS

Theme: Espionage

Halted

ZGloom

Clone of Gloom

A from-scratch re-implementation of the Amiga FPS Gloom, including support for its Zombie Massacre expansion.

Platforms:WindowsLinux

Stars49

Updated3 years ago

LicenseUnknown

Release2019

Genre: FPS

Theme: Sci-Fi

Halted

No preview

Hexen

Clone of Hexen

Raven Software's official release of the Hexen source code, published for learning and modification; the DMX sound library is excluded.

Platforms:DOS

Stars48

Updated13 years ago

LicenseGPL-2.0

Release2013

Genre: FPS

Theme: Fantasy

Archived

Hexen 2

Clone of Hexen II

Platforms:Windows

Stars48

Updated14 years ago

LicenseGPL2*

Release2012

Genre: FPS

Theme: Ancient History

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