Plot: Biniax is a free and open-source puzzle video game which was first released in 2005. A sequel, Biniax-2, was released in 2007, with a more polished look and feel, and different game modes: arcade, tactic and multiplayer. The most recent release was in 2012. Wikipedia
Plot: SuperTux is a free and open-source two-dimensional platform video game published under the GNU General Public License. The game was inspired by Nintendo's Super Mario Bros. series; instead of Mario, the hero in the game is Tux, the official mascot of the Linux kernel. Wikipedia
Plot: Armagetron Advanced is a multiplayer snake game in 3D based on the light cycle sequence from the film Tron. It is available for Linux, macOS, Microsoft Windows, AmigaOS 4 and OpenBSD as free and open-source software. Wikipedia
Plot: Frogatto & Friends is a platform game with adventure elements released in July 2010. The game received positive reviews, particularly for its gorgeous pixel art. The game is cross-platform and runs on Linux, AmigaOS4, AROS, Mac OS X, Microsoft Windows, iOS and BlackBerry Tablet OS. Wikipedia
Plot: Scorched 3D is a free and open source artillery game modeled after the MS-DOS game Scorched Earth. Scorched 3D offers a new game-play approach compared to the 2D original, such as: fully destructible ... Wikipedia