I'd say Ocarina of Time even though I enjoy it a lot, but there is not a whole lot to pick when I basically never dislike a game.
A lot of the reason I'd say Ocarina of Time is the most overrated game ever is because most who consider it to be one of the best games ever or something also consider Wind Waker and Twilight Princess, which are superior, to be trash.
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Currently Playing - StarCraft: Brood War