Arcade

Sonic Robo Blast 2 is a free and open source, multi platform 3D fan game of Sonic the Hedgehog, based on a modified version of Doom Legacy

Sonic Robo Blast 2 Kart is a free and open source, multi-platform kart racing game based on 3D Sonic and Sonic Robo Blast 2

Not Tetris 2 – free and open source, multiplatform classic Tetris, but with realistic physics

HexGL is a free and open source futuristic racing game for Linux

Lunar Lander is a free and open source simple arcade game in the style of a lunar lander

KSnakeDuel is a free and open source, simple clone of the Tron game