I was gonna say that Tetris has to be up there. I wrote Tetris for the TI-82, but never Doom; however, I have ported Doom to a (theoretically) credit-card sized platform, but not Tetris (though Tetris could run on a custom emulator on the same platform).
Tetris takes a lot less to run. You just need a few LEDs or an apartment building to display Tetris. Also somebody probably ported Tetris into Doom making all Doom ports into Tetris ports.
I was gonna say that Tetris has to be up there. I wrote Tetris for the TI-82, but never Doom; however, I have ported Doom to a (theoretically) credit-card sized platform, but not Tetris (though Tetris could run on a custom emulator on the same platform).
Tetris takes a lot less to run. You just need a few LEDs or an apartment building to display Tetris. Also somebody probably ported Tetris into Doom making all Doom ports into Tetris ports.
New challenge: port Doom to Tetris