You're probably kicking yourself for not thinking of it first. Instead of relying on one critic's point of view, mash them all together into one easily-understood uberscore. Rubbish games will be punished, quality will win out, and the occasional dodgy verdict will be smoothed over by the masses. That's the theory. Some games publishers hate it, others are trying to manipulate it, and the end result's a system that might end up misleading you more than the individual sources it relies on. So exactly how much can you trust Metacritic?