

Super Mario Kart makes use of SFX-DOS, which is essentially Nintendo’s proprietary development state for the SNES. But, buried in a leaked 1991 prototype of the game, a modder - who remains anonymous but goes by the screen name Mr元14 - found code for one.

The game did not launch with a level editor. Super Mario Kart, released in 1992 for the Super Nintendo Entertainment System, is the first game of the wildly popular Mario Kart series, kickstarting decades of drinking games for the dorm rooms of the world.
