 Although the US and Japanese versions of the game are exactly the same, there  are two known differences. First, the US versions main menu does not have a  difficulty setting like the Japanese version which lets you choose Very Easy,  Easy, or Normal gameplay. Second, in the US version, Weskers Battle Game can  be obtained by simply completing Chris Battle Game, unlike the Japanese  version, which in order to get Weskers Battle Game you must find his  sunglasses somewhere inside the normal game.