DevelopmentThe developer team, Midway, originally wanted to re-create all of the original enemies from the previous DOOM games, but due to deadlines and the memory constraints of the Nintendo 64 cartridge, they had to leave out Commando, Revenant, Arch-Vile and Spider Mastermind from the game.
Japanese versionIn the Japanese version all blood was coloured green.
RecreationOn July 1, 2003, a team of enthusiasts released their DOOM 64 Total Conversion for PC, with four extra levels. If you still have the original Doom2.wad, you can download and play the TC here.
Doom64EX was released on June 24, 2009. Unlike the previous Absolution TC, it boasts 100% recreation of the N64 game on Windows PCs. Screens comparing the ports can be found here.
Information also contributed by BurningStickMan and Daedolon.