Browse free open source First Person Shooters and projects for Windows below. Use the toggles on the left to filter open source First Person Shooters by OS, license, language, programming language, and project status.
A modern, cross-platform Quake game engine based on FitzQuake.
A cross-platform port of Hexen II game.
Odamex is a free, cross-platform, modern client-server Doom engine
DOOM / Heretic / Hexen source port with enhanced graphics and UI
Classic America's Army
Source port of Doom, Heretic, Hexen and Strife developed in Delphi
A fun realistic multiplayer free-and-open-source first-person-shooter!
Free and open source FPS based on Quake III Arena