FlightGear is an open-source flight simulator. It supports a variety of popular platforms (Windows, Mac, Linux, etc.) and is developed by skilled volunteers from around the world. Source code for the entire project is available and licensed under the GNU General Public License.
Race into Space is the free software version of Interplay’s Buzz Aldrin’s Race into Space. This is the reworked version following the source release for the computer version of the Liftoff! board game by Fritz Bronner. This was developed by Strategic Visions and published by Interplay in as a disk based game in 1992 and a cd-rom in 1994.
Eternal Lands is a free MMORPG (massively multiplayer online role playing game) set in a medieval fantasy world, with both historic elements – such as medieval architecture and weaponry – and fictional elements, such as other humanoid races and magic. In-game activities include exploring 39 different outside maps (plus numerous insides and caves), questing, worshiping gods, socializing with other players, player killing, and improving skills by fighting, gathering resources, and creating items.
For Windows, Linux and Macintosh. Source code available.
Egoboo is an open source, cross-platform computer game. It’s a three-dimensional dungeon crawling adventure that borrows a lot of elements from the roguelike genre. Egoboo is still under development, but it is fully playable.
Freedroid consists of two open-source games: FreedroidRPG and FreedroidClassic. FreedroidRPG is an isometric role playing game. FreedroidClassic is a 2D arcade game.
SkyRoads was a polished-up remake of BlueMoon first commercial game – Kosmonaut. The three months they spent developing this very addictive piece of entertainment was probably the best paid off time in Bluemoon’s history so far: although released as small scale shareware title in 1993, they managed to sell the game all over the world, getting LCR distribution deals for it from U.S. to Taiwan.
BlueMoon released the game as freeware.
Light and Shadow is a puzzle-platformer with a “light” twist, combining 2 areas in each Level, light and shadow, as well as 2 protagonists in 1 playable character, Dr. Shadow and Mr. Light.
While either of them can only survive in either light or shadow areas, the player must constantly switch between them and make the right decision about whose abilities to utilise.
Project Diaspora is a 2D Space Trading MMORPG open source for Windows, Linux and macintosh. Project Diaspora is a High quality, multi-player internet based game. Graphics are good, and game mechanics solid. Create your character or characters, buy a ship, outfit it with weapons, missiles, and equipment. Buy, transport and sell cargo at over a dozen planets in different zones of play.
As the title says and it will contain an in-game store where you’ll be able to buy fancy gear to customize your heroes.
