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

Hexen II for Dreamcast

Clone of Hexen II

A port of the Hexen II engine to the Sega Dreamcast; only the OpenGL renderer works, since the x86-only software renderer isn't supported.

Platforms:Dreamcast

Stars1

Updated4 years ago

LicenseGPL-2.0

Release2022

Genre: FPS

Theme: Ancient History

Halted

Quake4Doom

Clone of Quake 4

An integration of the Quake 4 SDK into the open-source Doom 3 engine, playable at visual parity except for missing particle effects.

Platforms:Windows

Stars1

Updated1 year ago

LicenseUnknown

Release2025

Genre: FPS

Theme: Sci-Fi

Halted

Savage: The Battle for Newerth

Clone of Savage: The Battle for Newerth

The official archived source code release of Savage: The Battle for Newerth, preserved via the Internet Archive.

Platforms:Windows

Stars1

Updated2 years ago

LicenseUnknown

Release2024

Genre: FPS

Theme: Fantasy

Halted

No preview

vkHexen

Clone of Hexen

An experimental Vulkan learning-project port of Hexen; currently not functional and crashes on startup.

Platforms:Windows

Stars1

Updated3 years ago

LicenseGPL-3.0

Release2023

Genre: FPS

Theme: Fantasy

Sporadic

No preview

Ascent

Clone of Descent

A Descent-inspired 3D shooter with six-degrees-of-freedom movement, built in C++ with the OGRE 3D engine; playable but sporadic.

Platforms:None

Stars0

Updated10 months ago

LicenseGPL-3.0

Release2025

Genre: FPS

Theme: Sci-Fi

Halted

No preview

Gauntlet of Thyrion

Clone of Hexen II

A fork of Hammer of Thyrion focused exclusively on a singleplayer macOS port of Hexen II, built via an included Xcode project.

Platforms:OSX

Stars0

Updated2 years ago

LicenseGPL-3.0

Release2023

Genre: FPS

Theme: Ancient History

Halted

No preview

Halloween 3D

Clone of Halloween: The New Nightmare

A work-in-progress, open-source 3D shooter written in C++ with OpenGL rendering, supporting lights, scenes, entities, and a camera system.

Platforms:Linux

Stars0

Updated4 years ago

LicenseGPL-3.0

Release2021

Genre: FPS

Theme: Horror

Halted

No preview

NakedHeretic

Clone of Heretic

Platforms:WindowsLinux

Stars0

Updated1 year ago

LicenseGPL-2.0

Release2024

Genre: FPS

Theme: Fantasy

Halted

No preview

NakedHexen

Clone of Hexen

Platforms:WindowsLinux

Stars0

Updated1 year ago

LicenseUnknown

Release2024

Genre: FPS

Theme: Fantasy

Active

Tremulous

Clone of Gloom (Quake)

Platforms:WindowsLinuxOSX

Stars0

Updated29 days ago

LicenseGPL2, CC-BY-SA*

Release2026

Genre: FPS

Theme: Sci-Fi

Sporadic

No preview

Turok: Dinosaur Hunter (N64)

Clone of Turok: Dinosaur Hunter

A mirror of the official Turok: Dinosaur Hunter N64 source code archive, including its audio tools.

Platforms:N64

Stars0

Updated8 months ago

LicenseGPL-3.0

Release2023

Genre: FPS

Theme: —

No preview

Aliens Vs Predator source update

Clone of Aliens Versus Predator

Platforms:Windows

LicenseUnknown

Genre: FPS

Theme: Sci-Fi

No preview

Arena 3D

Clone of Unreal Tournament

Platforms:TI calculator

LicenseUnknown

Genre: FPS

Theme: Sci-Fi

No preview

Atari Jaguar Source Code Collection

Clone of Alien vs Predator

Platforms:Jaguar

LicenseUnknown

Genre: FPS

Theme: Sci-Fi

No preview

Avara

Clone of Avara

Platforms:Classic Mac OS

LicenseMIT*

Genre: FPS

Theme: Post-Apocalyptic

Blake4SDL

Clone of Blake Stone: Planet Strike

Platforms:WindowsLinux

LicenseGPL2*

Genre: FPS

Theme: Sci-Fi

No preview

CS2D Beta

Clone of Counter-Strike

Platforms:Windows

LicenseGPL3*

Genre: FPS

Theme: —

No preview

Carnivores 2

Clone of Carnivores 2

Platforms:Linux

LicenseUnknown

Genre: FPS

Theme: —

Cytadela

Clone of Cytadela

Platforms:WindowsLinuxOSX

LicenseGPL3*

Genre: FPS

Theme: —

D2X-XL

Clone of Descent

Platforms:WindowsLinuxOSX

LicenseGPL2*

Genre: FPS

Theme: Sci-Fi

Doom Legacy

Clone of Doom

Platforms:WindowsLinux

LicenseGPL2*

Genre: FPS

Theme: Sci-Fi

Doom83

Clone of Wolfenstein 3D

Platforms:TI calculator

LicenseUnknown

Genre: FPS

Theme: —

Doom89

Clone of Doom

Platforms:TI calculator

LicenseGPL3*

Genre: FPS

Theme: Sci-Fi

Duke3D

Clone of Duke Nukem 3D

Platforms:WindowsLinuxOSX

LicenseUnknown

Genre: FPS

Theme: —

Duke3d_win32

Clone of Duke Nukem 3D

Platforms:Windows

LicenseUnknown

Genre: FPS

Theme: —

No preview

Duke3dw

Clone of Duke Nukem 3D

Platforms:Windows

LicenseGPL2*

Genre: FPS

Theme: —

DukeVR

Clone of Duke Nukem 3D

Platforms:Windows

LicenseGPL2*

Genre: FPS

Theme: —

ECWolf

Clone of Wolfenstein 3D

Platforms:WindowsLinuxOSX

LicenseGPL2, BSD*

Genre: FPS

Theme: —

EDuke32

Clone of Duke Nukem 3D

Platforms:WindowsLinuxOSX

LicenseUnknown

Genre: FPS

Theme: —

Eldritch

Clone of Eldritch

A first-person roguelike immersive-sim with Lovecraftian horror, random levels, and mystical powers, on itch.io for Windows, macOS, Linux.

Platforms:WindowsLinuxOSX

LicenseUnknown

Genre: FPS

Theme: Horror

Hammer of Thyrion

Clone of Hexen II

Platforms:WindowsLinuxOSX

LicenseGPL2*

Genre: FPS

Theme: Ancient History

No preview

Hexen for Linux

Clone of Hexen

Platforms:Linux

LicenseGPL2*

Genre: FPS

Theme: Fantasy

ICED Shadow Warrior

Clone of Shadow Warrior

Platforms:Windows

LicenseUnknown

Genre: FPS

Theme: —

In Pursuit of Greed

Clone of In Pursuit of Greed

Platforms:WindowsDOS

LicenseUnknown

Genre: FPS

Theme: Sci-Fi

Jake2

Clone of Quake 2

Platforms:None

LicenseGPL2*

Genre: FPS

Theme: Sci-Fi

No preview

JediAcademyLinux

Clone of Star Wars Jedi Knight: Jedi Academy

Platforms:Linux

LicenseGPL2*

Genre: Fighting

Theme: Fantasy

No preview

JediOutcastLinux

Clone of Star Wars Jedi Knight II: Jedi Outcast

Platforms:Linux

LicenseGPL2*

Genre: Fighting

Theme: Fantasy

K8Vavoom

Clone of Doom

Platforms:WindowsLinux

LicenseGPL3*

Genre: FPS

Theme: Sci-Fi

Ken's Labyrinth

Clone of Ken's Labyrinth

Platforms:DOS

LicenseUnknown

Genre: FPS

Theme: —

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