Nintendo’s Game & Watch can run Doom, barely - The Verge

The Game & Watch: Super Mario Bros.

The hackers settled on a package called “Minimal Doom IWAD” that replaces the game’s original textures with simplified versions, but they still had to make further adjustments like disabling sound to work within the Game & Watch’s 1.1 MB of usable storage.

The Game & Watch: Super Mario Bros.

is designed to evoke Nintendo’s original Game & Watch handhelds, while running a version of Nintendo’s NES classic, Super Mario Bros., as well as Super Mario Bros.