BrickBuster
BrickBuster is a free and open source, multi-platform Brick Breaker game whose goal is to survive as many rounds as possible
Sonic Robo Blast 2
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
Slingshot
Slingshot is a free and open source 2D turn-based strategy simulation game set in the gravitational fields of several planets
Sonic Robo Blast 2 Kart
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
BillardGL
BillardGL – free and open source 3D pool game for one or two players
Veloren
Veloren is a free and open source, multi-platform multiplayer voxel RPG inspired by games such as Cube World, Legend of Zelda: Breath of the Wild, Dwarf Fortress, and Minecraft
X-Moto
X-Moto is a free and open source multiplatform 2D motocross platformer game, a 2D motorcycle trial simulator
Not Tetris 2
Not Tetris 2 – free and open source, multiplatform classic Tetris, but with realistic physics
Wolfenstein: Blade of Agony
Wolfenstein: Blade of Agony is a free-to-play first-person shooter similar to Wolfenstein 3D, Medal of Honor, and Call of Duty, but with a more dynamic game in the spirit of Doom