Museum obtains rare demo of id Software's Super Mario Bros. 3 PC

1990 demo was rejected by Nintendo but led to id's own Commander Keen.

id Software

Rare Look at the Unreleased Super Mario Bros. 3 PC Prototype by id Software from 1990 - TechEBlog

I was practicing pixel art and tried to modify the Goomba sprite from Super Mario Bros. NES. Got a bit into the horror/halloween theme XD : r/PixelArt

An unreleased demo of id Software's Super Mario Bros. 3 PC port has been donated to a museum

35 years later, Mario 3 still does some things better than every Mario since

Wario, MarioWiki

Watch the Doom Creators' Version of Super Mario 3

Doom dev shares rare Super Mario Bros. 3 PC demo (update) - Polygon

Mario is Missing! - Super Mario Wiki, the Mario encyclopedia

id Software - Wikipedia