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.

Halted

Ken's Labyrinth port for Android OS

Clone of Ken's Labyrinth

A port of Ken's Labyrinth to Android using SDL2 and OpenGL ES, adding touch controls and engine improvements.

Platforms:Android

Stars12

Updated8 years ago

LicenseMIT

Release2016

Genre: FPS

Theme: —

Halted

No preview

Kingpin SDK

Clone 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.

Platforms:WindowsLinux

Stars12

Updated6 years ago

LicenseUnknown

Release2020

Genre: FPS

Theme: —

Halted

erampage

Clone of Redneck Rampage

A free, open-source EDuke32/Build engine port for running the Redneck Rampage series with your own game data files.

Platforms:Windows

Stars12

Updated6 years ago

LicenseUnknown

Release2015

Genre: FPS

Theme: —

Sporadic

No preview

re-virtua-cop-2

Clone of Virtua Cop 2

A work-in-progress reverse-engineering project for Virtua Cop 2 (1997 PC), including a browser-based asset explorer.

Platforms:Web

Stars12

Updated4 months ago

LicenseUnknown

Release2023

Genre: FPS

Theme: —

Archived

No preview

D3DQuake

Clone of Quake

A graphics-backend port of GLQuake that replaces its OpenGL calls with Direct3D 7.0 equivalents, targeting Windows with a DirectX 7 card.

Platforms:Windows

Stars11

Updated22 days ago

LicenseGPL-2.0

Release2014

Genre: FPS

Theme: Fantasy

Active

No preview

DukeGDX

Clone of Duke Nukem 3D

Platforms:Windows

Stars11

Updated2 months ago

LicenseUnknown

Release2018

Genre: FPS

Theme: —

Active

No preview

RedneckGDX

Clone of Redneck Rampage

Platforms:Windows

Stars11

Updated2 months ago

LicenseUnknown

Release2018

Genre: FPS

Theme: —

Halted

No preview

remc1

Clone of Magic Carpet

Platforms:Windows

Stars11

Updated3 years ago

LicenseGPL-3.0

Release2022

Genre: FPS

Theme: Fantasy

Active

No preview

BloodGDX

Clone of Blood

Platforms:Windows

Stars10

Updated2 months ago

LicenseGPL3*

Release2017

Genre: FPS

Theme: —

Halted

No preview

μQuake

Clone of Quake

μQuake is a personal Quake engine fork targeting modern compilers and lower memory use; development has stalled.

Platforms:Linux

Stars10

Updated5 years ago

LicenseGPL-2.0

Release2020

Genre: FPS

Theme: Fantasy

Sporadic

HHeretic

Clone of Heretic

HHeretic is a source port of Heretic for modern *nix systems, continuing Dan Olson's original Hacked Heretic project.

Platforms:Linux

Stars9

Updated10 months ago

LicenseGPL-2.0

Release2019

Genre: FPS

Theme: Fantasy

Active

No preview

WitchavenGDX

Clone of Witchaven

Platforms:Windows

Stars9

Updated2 months ago

LicenseUnknown

Release2018

Genre: FPS

Theme: Medieval

Halted

glDoom

Clone of Doom

glDoom Resurrected continues Bruce Lewis's original OpenGL Doom source port, adding fixes, an SDL2 backend, and Windows/Linux builds.

Platforms:WindowsLinux

Stars9

Updated1 year ago

LicenseUnknown

Release2022

Genre: FPS

Theme: Sci-Fi

Active

No preview

neortcw

Clone of Return to Castle Wolfenstein

A Return to Castle Wolfenstein source port based on iortcw, with a higher tick rate, Steam file detection and a CMake build.

Platforms:WindowsLinuxOSX

Stars9

Updated2 months ago

LicenseGPL-3.0

Release2026

Genre: FPS

Theme: Sci-Fi

Halted

Shadow Warrior for Linux

Clone of Shadow Warrior

icculus.org's Linux port of 3D Realms' 2005 GPL source release of Shadow Warrior.

Platforms:Linux

Stars8

Updated5 years ago

LicenseGPL-2.0

Release2021

Genre: FPS

Theme: —

Halted

No preview

AB3D-RTG

Clone of Alien Breed 3D

An Amiga build of John Girvin's Alien Breed 3D source, reviving the Chunky-Copper renderer for RTG output; currently unplayable.

Platforms:Amiga

Stars7

Updated4 years ago

LicenseUnknown

Release2021

Genre: FPS

Theme: Horror

Sporadic

No preview

Chocolate QuakeWorld

Clone of Quake

A minimalist source port of QuakeWorld preserving the classic multiplayer experience without modern enhancements, built with CMake.

Platforms:WindowsLinuxOSX

Stars7

Updated8 months ago

LicenseGPL-3.0

Release2025

Genre: FPS

Theme: Fantasy

Active

No preview

TekwarGDX

Clone of TekWar

Platforms:None

Stars7

Updated2 months ago

LicenseUnknown

Release2018

Genre: FPS

Theme: Sci-Fi

Halted

Alien Breed 3D I

Clone of Alien Breed 3D

A rebuild of Alien Breed 3D I for AGA Amiga from the original source, requiring original data files; playable, but development has halted.

Platforms:Amiga

Stars6

Updated1 year ago

LicenseUnknown

Release2023

Genre: FPS

Theme: Horror

Halted

Quake II for Dreamcast

Clone of Quake 2

An unofficial, software-rendered Dreamcast port of Quake II, running from demo or full commercial game data.

Platforms:Dreamcast

Stars6

Updated4 years ago

LicenseGPL-2.0

Release2021

Genre: FPS

Theme: Sci-Fi

Archived

No preview

TekWar

Clone of TekWar

Platforms:DOS

Stars6

Updated1 year ago

LicenseUnknown

Release2025

Genre: FPS

Theme: Sci-Fi

Halted

No preview

Wolfenstein 3D (embedded)

Clone of Wolfenstein 3D

A stripped-down Wolfenstein 3D port for the Stellaris LM3S6965EVB microcontroller, using 4-bit greyscale graphics.

Platforms:Stellaris

Stars6

Updated15 years ago

LicenseUnknown

Release2010

Genre: FPS

Theme: —

Halted

No preview

jedi_outcast

Clone of Star Wars Jedi Knight II: Jedi Outcast

Raven Software and Activision's official 2002 GPLv2 source release of Jedi Knight II: Jedi Outcast, not a third-party reimplementation.

Platforms:Windows

Stars6

Updated13 years ago

LicenseGPL-2.0

Release2013

Genre: Fighting

Theme: Fantasy

Halted

No preview

remc1hw

Clone of Magic Carpet

Platforms:Windows

Stars6

Updated3 years ago

LicenseGPL-3.0

Release2022

Genre: FPS

Theme: Fantasy

Halted

LAB3D/SDL (ktpanda)

Clone of Ken's Labyrinth

A port of Ken's Labyrinth to modern Windows and Unix via SDL and OpenGL, keeping the original gameplay but requiring its data files.

Platforms:WindowsLinux

Stars5

Updated6 years ago

LicenseUnknown

Release2015

Genre: FPS

Theme: —

Active

No preview

PowerslaveGDX

Clone of Powerslave

Platforms:Windows

Stars5

Updated2 months ago

LicenseUnknown

Release2019

Genre: FPS

Theme: Ancient History

Halted

No preview

magiccarpet

Clone of Magic Carpet

Platforms:Windows

Stars5

Updated10 years ago

LicenseUnknown

Release2016

Genre: FPS

Theme: Fantasy

Halted

No preview

GL Quake II on Wayland

Clone of Quake 2

A port of GL Quake II to run under Wayland on the Nemo platform, with no further detail given beyond its name.

Platforms:Linux

Stars4

Updated7 years ago

LicenseUnknown

Release2018

Genre: FPS

Theme: Sci-Fi

Sporadic

No preview

Lilium Salvation

Clone of Dark Salvation

An open-source engine reimplementation compatible with Dark Salvation, built without the original source, targeting Linux and macOS.

Platforms:LinuxOSX

Stars4

Updated4 months ago

LicenseGPL-2.0

Release2021

Genre: FPS

Theme: Adult

Sporadic

No preview

NakedLinuxDoom

Clone of Doom

The Linux Doom source converted to SDL3 and 64-bit, with no other changes, for macOS, Linux and Windows.

Platforms:WindowsLinuxOSX

Stars4

Updated7 months ago

LicenseMIT

Release2025

Genre: FPS

Theme: Sci-Fi

Halted

Robot Redemption

Clone of Hovertank 3D

A Hovertank 3D-engine MS-DOS game about rescuing robots from Jupiter's moons.

Platforms:WindowsLinuxDOS

Stars4

Updated12 years ago

LicenseGPL-2.0

Release2014

Genre: FPS

Theme: —

Active

No preview

LSPGDX

Clone of Rock'n Shaolin: Legend of Seven Paladins 3D

Platforms:Windows

Stars3

Updated2 months ago

LicenseGPL3*

Release2019

Genre: FPS

Theme: Fantasy

Halted

Quake for Dreamcast

Clone of Quake

An unofficial Dreamcast port of the original Quake, with software and GL renderers, mod support, and VMU save compression.

Platforms:Dreamcast

Stars3

Updated4 years ago

LicenseGPL-2.0

Release2022

Genre: FPS

Theme: Fantasy

Active

No preview

WangGDX

Clone of Shadow Warrior

Platforms:Windows

Stars3

Updated2 months ago

LicenseGPL3*

Release2020

Genre: FPS

Theme: —

Archived

No preview

Witchaven

Clone of Witchaven

Platforms:DOS

Stars3

Updated1 year ago

LicenseUnknown

Release2025

Genre: FPS

Theme: Medieval

Archived

No preview

Witchaven II: Blood Vengeance

Clone of Witchaven II: Blood Vengeance

Platforms:DOS

Stars3

Updated1 year ago

LicenseUnknown

Release2025

Genre: FPS

Theme: Fantasy

Halted

Corridor 8: Galactic Wars

Clone of Corridor 8: Galactic Wars

A fan-preserved prototype source archive of the DOS game Corridor 8: Galactic Wars, distinct from Corridor 7 despite similar filenames.

Platforms:DOS

Stars2

Updated9 years ago

LicenseUnknown

Release2019

Genre: FPS

Theme: Sci-Fi

Halted

No preview

Lab3dGLES

Clone of Ken's Labyrinth

A port of Ken's Labyrinth to modern systems using OpenGL/OpenGLES, built on LAB3D/SDL with Wiz and Caanoo handheld support.

Platforms:WindowsLinux

Stars2

Updated12 years ago

LicenseUnknown

Release2013

Genre: FPS

Theme: —

Archived

No preview

Q2Pro

Clone of Quake 2

Q2PRO is an enhanced, now-archived Quake II client and server adding modern rendering, sound, and networking features.

Platforms:WindowsLinux

Stars2

Updated10 months ago

LicenseGPL-2.0

Release2025

Genre: FPS

Theme: Sci-Fi

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