A fantasy RPG game available for Linux, FreeBSD and BeOS. MacOS and Windows support will come soon.

Free isometric real-time MMORPG. 2d/3d graphics, 3d sound effects, digital ambient music.

Danger from the deep (aka dangerdeep) is a Free / Open Source World War II German submarine simulation. [Linux / Windows] (C++)

Deliantra is a free software, multiplayer RPG and adventure game, much similar in style to nethack and moria. It is fully graphical and runs in realtime and set in a medieval environment. (GPL) [GNU/Linux, Mac OS X, Windows]

An OpenGL racing game featuring Tux, the Linux mascot. The goal of the game is to slide down a snow- and ice-covered mountain as quickly as possible.(C++, TCL) [Linux, MacOS X]

2D single player space strategy, combat, and trading game. (C++) [OS Independent]

The FlightGear flight simulator project is an open-source, multi-platform, cooperative flight simulator development project. Source code for the entire project is available. (OpenGL)[OS Independent]

Open source games weblog and list.

Clone of the classic game "Paradroid". (C, Python) [MacOS, Windows 95/98/2000, Linux]

The player has to strike the correct colored squares at the appropriate time during the songs to produce sounds. The objective of this game inspired by Guitar Hero is to finish a song and score the biggest amount of points possible. (Python) [Cross-pl...