Unreal Tournament

Unreal is a series of first-person shooter video games developed by Epic Games. The series includes: Unreal (1998); Unreal : Return To Na Pali (1999); Unreal...

Free Open Source Mac Windows Linux

AssaultCube

AssaultCube is a free, multiplayer, first-person shooter game, based on the CUBE engine. Taking place in realistic environments, with fast, arcade gameplay, it's...

• Discontinued No more updates since Nov 2013 : http://assault.cubers.net/ (like Alien Arena, also noticed discontinued)

Free Open Source Mac Windows Linux PortableApps.com

Cube 2: Sauerbraten

Cube 2: Sauerbraten is a free multiplayer/singleplayer first person shooter, built as a major redesign of the Cube FPS. Much like the original Cube, the aim of this...

• Discontinued No more updates since Jan 2013 : http://sauerbraten.org/ . 2013, like Alien Arena, noticed discontinued.

Free Open Source Mac Windows Linux BSD

Urban Terror

Urban Terror started as a realism based "total conversion" mod for Quake III Arena. Nowadays, Urban Terror is played using the free, stand-alone, ioquake3...

• Really nice and good game ! It should be more popular... bogdancioata • Feb 2016 • 1 agrees and 0 disagrees Disagree   Agree

Free Mac Windows Linux

Enemy Territory: Legacy

Enemy Territory: Legacy is an open source project based on the code of Wolfenstein: Enemy Territory.

• Fantastic predecessor to CS, kept alive by the community. The class based combat keeps the game fresh. rattbag • Dec 2017 Disagree   Agree

Free Open Source Mac Windows Linux

Alien Arena

Alien Arena is a free and opensource first-person shooter game that combines a 1950s-era sci-fi atmosphere with gameplay similar to...

• Discontinued The last update was released on September 6th, 2013.

Free Open Source Mac Windows Linux BSD

Digital Paint: Paintball 2

Digital Paint: Paintball 2 is a Paintball game that started out as a mod for quake 2 but then took on a life of its own as an open source fps game with a global player...

Free Open Source Windows Linux

AssaultCube Reloaded

A free-and-open-source first-person-shooter aimed at improving the classic game, AssaultCube!

Free Open Source Windows Linux

Uebergame

Übergame is a free open source, realism like, multi-purpose, multiplayer, casual, first-person-shooter game.

Free Open Source Windows Linux

Krunker.io

Krunker.io is a free io Multiplayer First Person Shooter. No Download browser FPS! Free!.

Free Mac Windows Linux Web

TrueCombat: Elite & CQB

TrueCombat: Elite is a FREE modification for the Enemy Territory game (also free). It is a realistic modern day FPS featuring state of the art models and textures. ...

Free Mac Windows Linux

Tremulous

Tremulous is a free, open source game that blends a team based FPS with elements of an RTS. Players can choose from 2 unique races, aliens and humans. Players on both...

• Discontinued The project is no longer developed. Last version, 1.2 Beta, released in December 2009, can be still downloaded from the official website. The project has been forked by https://alternativeto.net/software/unvanquished/

Free Open Source Mac Windows Linux

Nexuiz Classic

Nexuiz was originally developed by Lee Vermeulen and Forest ‘LordHavoc’ Hale, who started Alientrap in the summer of 2002. The goal of the project was to create a high...

• Discontinued Nexuiz is no longer developed. It's successor is https://alternativeto.net/software/xonotic/ , but last version of Nexuiz Classic, 2.5.2, released in 2009, can be still downloaded from the official website.

Free Open Source Mac Windows Linux

Insurgency

Take to the streets for intense close quarters combat, where a team's survival depends upon securing crucial strongholds and destroying enemy supply in this...

Commercial Mac Windows Linux Steam

Ballistic Overkill

Ballistic Overkill is a fast paced PvP shooter. Easy pick up and play, no complicated setups or rules: it’s kill or be killed! Select a class with unique skills and...

Commercial Mac Windows Linux Steam SteamOS