Mario 5

Mario 5 is a rumoured early version of Super Mario 64 for the Nintendo 64, back when it was still being developed under the codename Project Reality. The only known mention of this alleged game was in page 56 of the February 1994 issue of the Electronic Gaming Monthly magazine, where it was said to debut as a pack-in for the Project Reality console and allegedly, according to a source deep within Nintendo, it was to take advantage of Project Reality's rendering and modelling capabilities to create Mario worlds unlike "anything that has ever been seen before".

Given how there is very little mentioning of this game anywhere besides Electronic Gaming Monthly, its unknown if this was ever actually intended to be a game at one point or if any builds actually exist of it within the Nintendo company. However, given how a lot of the information that Quartermann gave in the Electronic Gaming Monthly magazine is fake, its highly unlikely that Mario 5 ever actually existed as a game.