Doom

Doom is the classic id Software game that preceded Quake, that lust its lustre for me on its third incarnation – or should I say carnage? – where you spend the whole first level in the dark with nothing but a pistol or a flashlight. Boring.

Some enterprising folk, however, have managed to [port the original] to all kinds of hardware, including a Texas Instruments calculator and also to an iPod (more than once, actually), which has become a sort of rite of passage for hackable hardware and homebrew.