Short bio: Computer Scientist, FOSS supporter (read more)
Tux Machines (TM)-specific
Free Game Alliance is a collection five free and open source games spread across a variety of genres. All these games are cross platform and works on Linux, Mac and Windows. The initiative was started by Atomic Blue, makers of MMORPG PlaneShift. However, FGA is made by all the projects participating in it.
The games are:
Rigs of Rods
The Battle for Wesnoth