The flexible game engine
Xash3D FWGS engine
An OpenGL RTS game engine written in C
An iOS & tvOS Frontend for Multiple Emulators
Orx: Portable Game Engine
This is a re-implementation of the 1995 PSX game wipEout
A simple and easy-to-use library to enjoy videogames programming
A completely free, open-source, 2D game engine
Game engine to build text adventures.
The ioquake3 community effort to continue supporting/developing id's
3D game engine/framework in C, with Luajit and Python bindings now
Go bindings for raylib, a simple and easy-to-use library
A free and open-source Touhou Project fangame
A modern, cross-platform Quake game engine based on FitzQuake.
SDL based generic 2D game engine
Old style soccer game with many exciting features
0 A.D. is a free, open-source, cross-platform real-time strategy game.
A cross-platform port of Hexen II game.
Open source FPS/RTS Game
A free 3d game for PC that does not limit the player. Fight,Build,Gain
A fun realistic multiplayer free-and-open-source first-person-shooter!
A 16 bit style game on the 16-bit IBM XT.