A complete first-person shooter in 2,298 bytes. The record it targets sits at 97,280.
Loads a DOS emulator in your browser
W A S D / arrows — move & turnSpace — fireEsc — quit
What you are looking at
A from-scratch x86 DOS program: raycast 3D walls, enemies, shooting, a win screen.
2,298 bytes — smaller than this sentence's worth of text, and 48x under the Guinness record for fewest bytes in a first-person shooter (.kkrieger, 97,280 bytes, 2004).
The math tables, the map, and the palette are all generated at startup, so almost nothing is stored in the file.