Resident Evil Zero, known as BIOHAZARD 0 (バイオハザード0,Baiohazādo 0?) in Japanese, is the name of a shelved[Note 1] Capcom game developed for the Nintendo 64 console. Development was halted due to limitations in Nintendo 64 cartridge space (the maximum being 64MB). Rather than waste a considerable amount of money in cutting down the game, Capcom elected to wait for a "Dolphin" (the GameCube's development title) SDK and transfer data onto it. When the game was found to be incompatible, a native Nintendo version was made from scratch.
The game was to be released at the end of 2000, and featured in Spring's TGS 2000 and E3 2000 events. While the E3 2000 demo was recorded by players at the event, new footage from the TGS 2000 build was released by Capcom in 2015 in the lead-up to Resident Evil Zero's HD re-release.
↑Based on official sources, the game was not officially cancelled but developent was halted.