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

Xonotic

Xonotic is a free (GPL), fast-paced first-person shooter that works on Windows, OS X and Linux. The project is geared towards providing addictive arena shooter gameplay...

Free Open Source Mac Windows Linux BSD PortableApps.com

Quake

Quake is a series of first-person shooter video games released by id Software. In the game, players must find their way out of various maze-like, medieval...

Commercial Mac Windows Linux Steam

Overwatch

Overwatch is a team-based shooter where heroes do battle in a world of conflict. Overwatch feature squad-based combat with two opposing teams of six players each....

Commercial Windows

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

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

Warsow

Warsow is a completely free fast-paced first-person shooter (FPS) for Windows, Linux and Mac OS X, set in a futuristic cartoonish world where rocketlauncher-wielding...

• Discontinued Development has been discontinued, as stated at https://www.warsow.net/forum/thread/17216/1 . Last version, 2.1, released in March 2016, can be still downloaded from the official website.

Free Open Source Mac Windows Linux Web

Unvanquished

Unvanquished is a free, open-source first-person shooter combining real-time strategy elements with a futuristic, sci-fi setting. It is available for Windows, Linux, and...

Free Open Source Mac Windows Linux

OpenArena

OpenArena is a community-produced deathmatch FPS based on GPL idTech3 technology. There are many game types supported including Free For All, Capture The Flag...

• Discontinued Development is not stopped but last version, 0.8.8, was released in February 2012.

Free Open Source Mac Windows Linux

Painkiller

The game is inspired by such classic titles as Quake and Doom, with the emphasis on killing large numbers of monsters. The game is divided into five chapters, each about...

Commercial Windows

Blacklight Retribution

Blacklight Retribution is a fast paced, adrenaline pumping free to play first person shooter (FPS) based in a futuristic urban warzone. Blacklight Retribution provides...

Free Windows

Serious Sam

Serious Sam is a first-person shooter video game series that follows the adventures of protagonist Sam "Serious" Stone and his fight against the forces of the...

Commercial Mac Windows Linux Android iPhone ... Android Tablet iPad

Ironsight

Ironsight is a free to play 1st person shooter which places you in the footsteps of a warrior fighting for control of the last natural resources on Earth. It is the year...

Freemium Windows

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

Freedoom

Freedoom is a WIP a complete free content game based on the Doom engine. It's not an engine, but it's replacement game data with entirely original content...

Free Open Source Mac Windows Linux