Hovertank 3D is a first-person shooter computer game developed by Id Software and published by Softdisk in April, 1991 that is sometimes claimed to be the first First-person Shooter or even the first 3D game for MS-DOS (inaccurately - it was preceded by several years by Microsoft Flight Simulator. The game used the same combination of scaled sprites and drawn walls that would later show up in Catacomb 3D and Wolfenstein 3D, but the walls in Hovertank 3D were in solid color, they lacked any textures. The credits are