bootRogue (2019)

[DrWho42]

This is bootRogue (https://github.com/nanochess/bootRogue), a roguelike game that fits in 510 bytes of x86 assembler code. It can run from a floppy disk or as a MS-DOS COM file.
source: youtube (https://www.youtube.com/watch?v=DMMr4z6kU5g)

[NAHTMMM]

Neato! That's not a lot of space to get a very developed game written in.