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 environments while battling a variety of monsters using a wide array of guns.

Commercial Mac OS X Windows Linux Steam

Cube 2: Sauerbraten

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

Free Open Source Mac OS X Windows Linux BSD

Red Eclipse

Red Eclipse is a fun-filled new take on the first person arena shooter, built as a total conversion of Cube Engine 2, which lends itself toward a balanced gameplay, with a general theme of agility in a variety of environments.

Free Open Source Mac OS X Windows Linux BSD

Urban Terror

Urban Terror started as a realism based "total conversion" mod for Quake III Arena.

Free Mac OS X 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 teams are able to build working structures in-game like an RTS.

Free Open Source Mac OS X 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 quake , https://alternativein .

Free Open Source Mac OS X Windows Linux BSD

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

Singularity

Singularity is a first-person shooter with survival-horror elements. A main gameplay device is an artifact known as the Time Manipulation Device (TMD). The TMD is...

Commercial Windows Steam