Browse free open source First Person Shooters and projects for Windows and Mac below. Use the toggles on the left to filter open source First Person Shooters by OS, license, language, programming language, and project status.

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  • 1
    BZFlag - Multiplayer 3D Tank Game
    OpenSource OpenGL Multiplayer Multiplatform Battle Zone capture the Flag. 3D first person tank game. Download the latest version at https://www.bzflag.org/downloads/ Development has moved to Github: https://github.com/BZFlag-Dev/bzflag (The SourceForge binary releases for Windows and macOS are very outdated. Please download the latest version from our website.)
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    Downloads: 2,965 This Week
    Last Update:
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  • 2
    Cube 2: Sauerbraten (game engine & FPS)
    3D game engine (more powerful redesign of the Cube engine) and FPS game
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    Downloads: 599 This Week
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  • 3
    Hexen II: Hammer of Thyrion

    Hexen II: Hammer of Thyrion

    A cross-platform port of Hexen II game.

    Hammer of Thyrion (uHexen2) is a cross-platform port of Raven Software's Hexen II source. It is based on an older linux port, Anvil of Thyrion. HoT includes countless bug fixes, improved music, sound and video modes, opengl improvements, support for many operating systems and architectures, and documentation among many others.
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    Downloads: 210 This Week
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  • 4
    This is one of the most popular Doom source ports. It is available for DOS, Windows, Linux and Mac OS X, and should build on any POSIX platform which supports SDL. It enhances Doom with things like TCP/IP networking, OpenGL renderer, Heretic support and much more.
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    Downloads: 124 This Week
    Last Update:
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  • 5
    Nexuiz is a multiplayer first-person shooter. It is distributed under the GNU General Public License (GPLv2). Version 1.0 was released on May 31, 2005. The current version is, 2.5.2.
    Downloads: 123 This Week
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  • 6
    OpenArena

    OpenArena

    Free and open source FPS based on Quake III Arena

    OpenArena aims to be a free, yet compatible clone of Quake III Arena. It also strives to add subtle enhancements such as new gametypes, playermodels and of course maps! Further improvements are incorporated by using the ioquake3 engine.
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    Downloads: 131 This Week
    Last Update:
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  • 7
    PrBoom, the purest Doom-Port? Aims to be the most stable Doom port with the highest compatibility to the major Doom versions. Highres software and nice OpenGL rendering. Full Boom and most if not all MBF features.
    Downloads: 117 This Week
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  • 8
    Doomsday Engine

    Doomsday Engine

    DOOM / Heretic / Hexen source port with enhanced graphics and UI

    A portable game engine for classic first person shooters such as DOOM, Heretic and Hexen. Lets you enjoy the original games using modern technology, including high-resolution OpenGL graphics, 3D models, and dynamic lighting effects.
    Downloads: 43 This Week
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  • 9
    Modified PrBoom port with uncapped framerate, variable gamespeed, re-record, walkcam, chasecam, full mouselook, fov and other features without loss of compatibility with original DOOM.
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    Downloads: 35 This Week
    Last Update:
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  • 10
    Aleph One: Marathon Open Source
    Aleph One is the open source continuation of Bungie's Marathon 2 FPS game engine. Aleph One plays Marathon, Marathon 2, Marathon Infinity, and 3rd-party content on a wide array of platforms, with (optional) OpenGL rendering, Internet play, Lua scripting, and more.
    Downloads: 31 This Week
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  • 11
    Odamex

    Odamex

    Odamex is a free, cross-platform, modern client-server Doom engine

    Odamex is a free, cross-platform (Mac, Windows, Linux) modification of the Doom engine that allows players to easily join servers dedicated to playing Doom online. The goal of Odamex is to add enhancements to Doom while still retaining that "classic Doom feel" we all know and love about the original game.
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    Downloads: 54 This Week
    Last Update:
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  • 12
    ezQuake
    ALL FILES FOUND HERE ARE _OLD_, PLEASE MOVE TO https://ezquake.github.io FOR THE LATEST VERSIONS Combining the features of all modern QuakeWorld® clients, ezQuake makes QuakeWorld® easier to start and play. The immortal first person shooter Quake® in the brand new skin with superb graphics and extremely fast gameplay. The project started in August 2004 as a derivate of the FuhQuake client by fuh which is a derivate of ZQuake QuakeWorld client by Tonik, one of the current ezQuake developers. Finally, ZQuake is a derivate of QuakeWorld client made by Id Software. This company has created the Quake game itself and later on released the source codes of game executables under GNU General Public License. Because id Software didn't release the whole game for free to the public you still need some of the original files from Quake to play QuakeWorld using our client.
    Downloads: 27 This Week
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  • 13
    AssaultCube Reloaded

    AssaultCube Reloaded

    A fun realistic multiplayer free-and-open-source first-person-shooter!

    ACR is a fun realistic multiplayer free-and-open-source first-person-shooter! This project has moved to GitHub. A mirror of releases is here.
    Downloads: 9 This Week
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  • 14
    SonOyuncu Makro 15+CPS

    SonOyuncu Makro 15+CPS

    Ücretsiz SonOyuncu macrosu, minimum 15CPS garantili.

    Bu program UfukGames tarafından yapılmıştır. Güvenli, hızlı ve az yer kaplar. SonOyuncu uygulamasının içine makro programımız konulmuştur. Oyun içinde eş zamanlı olarak açıp kapatabilirsiniz.
    Downloads: 24 This Week
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  • 15
    hyper3DGE Project

    hyper3DGE Project

    3D-Accelerated open-source DOOM engine

    As a continuation of the EDGE Project, hyper3DGE gives the end-user more power from the most advanced alternative DOOM engine - combined with portability to most systems, including game consoles.
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    Downloads: 11 This Week
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  • 16
    Java port of the Quake2 game engine
    Downloads: 5 This Week
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  • 17
    nQuake

    nQuake

    A QuakeWorld package containing everything needed to play QW right now

    NOTE: THIS PROJECT HAS MOVED TO GITHUB. Download from http://nquake.com Source code: http://github.com/nquake QuakeWorld is a very fragmented game. Installing QuakeWorld involves installing Quake, downloading a client, downloading textures, scripts, addons, maps and much more. nQuake does all this for you with a simple online installer. nQuake always installs a completely updated package of QuakeWorld that simply works. nQuake has become the standard within QuakeWorld, so even if you don't like the content of nQuake, it's a very good base for your installation. If you run into problems - simply install nQuake fresh and modify it until you are satisfied. Getting help with issues you bump into will be a lot easier if you started out with nQuake.
    Downloads: 4 This Week
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  • 18
    ** Freedoom has moved to Savannah: http://savannah.nongnu.org/projects/freedoom/ **
    Downloads: 15 This Week
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  • 19
    Fast-paced multiplayer cross-platform 3D Internet space combat. Check http://www.openparsec.com/ for the latest.
    Downloads: 3 This Week
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  • 20
    World of Padman
    UPDATE(2016-03-17) This repository has moved to GitHub: https://github.com/worldofpadman/gamesource Full downloads, patches and sourcecode for the "World of Padman" game, also known as WoP ( http://worldofpadman.net/ ). WoP is based upon Quake 3 gamecode and uses a modfied version of the ioquake3 engine ( http://ioquake3.org/ ).
    Downloads: 3 This Week
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  • 21
    ChaosEsqueAnthology

    ChaosEsqueAnthology

    A free 3d game for PC that does not limit the player. Fight,Build,Gain

    (NOTE: Make sure to download Volume2 aswell!: http://sourceforge.net/p/chaosesqueanthologyvolume2/ ) 200+ weapons. Build-able enter-able buildings (Like an FPS RPG but with interiors) (Multi-tool/ Utili-tool). City generation (all buildings enterable). A 2 iso (6GB) exploration of what QuakeC can do. Over 100 maps included, along with map editor and sourcecode. Fully free and opensource: code and media. A modification of Xonotic which included extended weapons, maps, vehicles, buildable buildings, mounted weapons, spell casting, monsters, player characters, textures, and game mode (such as colorwar (think liquidwar)) To pick up items press F. To enter vehicles/mountedguns press F. To reload press R. To walk press W A S D (direction) To jump press SpaceBar Dev Enviorment (git repos) in tar.gz: https://sourceforge.net/projects/chaosesquedevenv/ DVD Case and DVD Labels and Extras (ISO signing info): https://sourceforge.net/projects/chaoseesquesupplemental/
    Downloads: 13 This Week
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  • 22
    Smokin' Guns
    Smokin' Guns is a GPLv2 licensed first person Western style shooter based on the Quake 3 engine (Id Tech 3) developed by a loosely knit team of developers and artists. This project represents the game engine.
    Downloads: 2 This Week
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  • 23
    A PHP 5 library for querying game servers. Currently supporting over 160 games, including source (half-life), unreal and quake engine games, ase & gamespy protocols. Newer games supported are Crysis & Call of Duty 5. Also supports Teamspeak 2.
    Downloads: 3 This Week
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  • 24
    Game Stats

    Game Stats

    Logfile parser for Call of Duty (COD) and Soldier of Fortune 2

    Game Stats generates web-based static .HTML statistics by parsing a game log file. Currently supports COD (Call of Duty) and Soldier of Fortune 2 w/OSP or ROC mods. As of 1.4, it ships with its own executable, and doesn't require PHP or MySQL.
    Downloads: 7 This Week
    Last Update:
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  • 25
    Industri, started life as a Quake based single player game, built on the strength of Tenebrae. Now using the Doom 3 engine
    Downloads: 6 This Week
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