Wolfenstein83 – Wolfenstein 3D for TI-83 calculator

“No it’s not one of those slow and unplayable basic games. This is a real-time 3d-raycaster based on the game by id. Also includes an on-calc mapeditor.”

ticalc.org via Fark

Wolfenstein 3D is the classic first person shooter game, from which, according to Wikipedia, the genre was born. It’s engine was later released by the developer, id Software, as open source.