What you just saw, provided of course you clicked the play button, claims to be a version of DOOM running on the Texas Instruments TI-83 calculator, even though it obviously is Wolfenstein 3D. Still, it's quite an impressive programming feat and you'd better visit the PocketGamer Blog to find out more. You could read a bit on the history of the FPS too, you know.
Related posts: Pokemon TI-83, TI-85 emulator for the DS, Game & Watch v.2.1.
Related Tags: TI-83, TI-83 DOOM, Doom, Wolfenstein 3d, Texas Instruments, TI 83, Calculator gaming, Games, Game