This is a 3D console game engine for making a FPS (first person shooter) in the Windows command prompt.
Links:
Console 3D fps: https://www.youtube.com/watch?v=xW8skO7MFYw
Upgraded console 3D fps: https://www.youtube.com/watch?v=HEb2akswCcw
Tetris: https://www.youtube.com/watch?v=8OK8_tHeCIA&list=PLrOv9FMX8xJE8NgepZR1etrsU63fDDGxO