OpenJK is an effort by the JACoders group to maintain and improve the game engines on which the Jedi Academy (JA) and Jedi Outcast...
Open source implementation of ALIVE engine that powers Oddworld Abes Oddysee and Oddworld Abes Exoddus.
Space Nerds In Space is an open source (GPLv2) cooperative multiplayer networked starship simulator for linux (and possibly Mac OSX too.Genre: Social, Simulation
by Graeme Gott
Simsu is a basic Sudoku game. You can switch between filling in notes (pencil mode), or filling in answers (pen mode).Genre: Puzzle
A opensource reimplementation of the LBA (Little Big Adventure, aka relentless) game engine.
Object-Oriented Graphics Rendering Engine (OGRE) is a scene-oriented, real-time, 3D rendering engine, as opposed to a game engine.
You know Age of Empires. You know its bugs.
FreeSO (“Free Simulator Online”) is a reimplementation of The Sims Online™’s game engine, using C# and Monogame.
31 Mar 2016)
Radix is a free and open source game engine in development.