Commercial games with published source code > Hovertank 3D
FPS developed by id Software. Features pseudo-3D graphics with raycasting technique, before Catacomb 3D and Wolfeinstein 3D. Written in C and assembly.
FPS developed by id Software. Features pseudo-3D graphics with raycasting technique, before Catacomb 3D and Wolfeinstein 3D. Written in C and assembly.