Metal Gear Rising Revengeance hits stores today and while it's not part of the main Metal Gear storyline, it's cool enough to stand on its own merit. As Raiden, it's your mission to slice your way out of a looming terrorist disaster. When we got our hands on the game, we couldn't help but notice a few things that you should know before you break out the bucks. Here are 10 Things You Should Know About Metal Gear Rising: Revengeance.