id Software's Super Mario Bros. 3 PC port is in a museum now

The founders of id Software tried to pitch Nintendo on a Super Mario Bros. 3 PC port - that demo is now in a museum

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Retro - Museum obtains rare demo of id Software's Super Mario Bros. 3 PC port, 1990 demo was rejected by Nintendo but led to id's own Commander Keen

Developers publish demo images of PC version Super Mario Bros. 3 - GIGAZINE

id Software - Wikipedia

Super Mario Bros. 3 PC port by Doom creator id Software recovered by museum

Retro - Museum obtains rare demo of id Software's Super Mario Bros. 3 PC port, 1990 demo was rejected by Nintendo but led to id's own Commander Keen

Id Software's demo for Mario 3 on PC is now in a museum

Super Mario Bros. 3 Demo (1990) : John Romero : Free Download, Borrow, and Streaming : Internet Archive

Developers publish demo images of PC version Super Mario Bros. 3 - GIGAZINE

Nintendo Takes Down Mario NFT Game from 1-UP Platform; Unofficial and Unlicensed by the Japanese Developer

Super Mario Bros. 3 - Wikipedia

Retro - Museum obtains rare demo of id Software's Super Mario Bros. 3 PC port, 1990 demo was rejected by Nintendo but led to id's own Commander Keen

Id's Mario PC Port Discovered In Museum Donation

Id Software's demo for Mario 3 on PC is now in a museum