Vault 74 is one of the Vault-Tec vaults. The vault was not mentioned in any game and appears only in the game files of Fallout: New Vegas. It was originally made by Bethesda Softworks developers for the official Fallout 3 G.E.C.K. tutorials. Despite not actually appearing in the game file of Fallout 3, it appears as cut content in the game files of Fallout: New Vegas, although is only accessible through the use of the console commands.