Unreal Tournament

Unreal is a series of first-person shooter video games developed by Epic Games.

Free Open Source Mac OS X Windows Linux Mac

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

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 which is all spawned and driven by the community itself.

Free Open Source Mac OS X Windows Linux BSD

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

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 addictive and fun! .

Free Open Source Mac OS X 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, Domination, Overload, Harvester, and more.

Free Open Source Mac OS X Windows Linux

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 pigs and lasergun-carrying cyberpunks roam the streets.

Free Open Source Mac OS X Windows Linux Web

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

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 Mac OS X.

Free Open Source 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

Halo

Halo is a science fiction, first-person shooter video game series, that centers on an interstellar war between humanity and a theocratic alliance of aliens known as the Covenant.

Commercial Mac OS X Windows Xbox Live

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 five levels long.

Commercial 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 and clan management system.

Free Open Source Windows Linux

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 notorious extraterrestrial overlord Mental who seeks to destroy...

Commercial Mac OS X Windows Linux Android iPhone Android Tablet iPad

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, Compatible with a majority of game mods made for Doom.

Free Open Source Mac OS X Windows Linux

Jake2

Jake2 is a Java 3D game engine. It is a port of the GPL’d Quake2 game engine from id Software.

Free Open Source Mac OS X Windows Linux Web

CrossFire

Cross Fire is a free online first-person shooter featuring persistent rankings and five game modes – including the exclusive stealth-action Ghost Mode.

Freemium Windows

LawBreakers

LawBreakers is upcoming class-based first person shooter game. Developed by Boss Key Inc.

Commercial Windows Playstation Xbox