Attack on Titan revolves around the last bastion of humanity. For reasons yet to be fully explained, our species has been beaten back into a small settlement protected by three concentric Walls. The culprits? Humanoid giants that instinctively hunt, kill and eat people for the simple pleasure of the act. It's all a bit unpleasant, I can assure you. -Three Dimensional Maneuvering Equipment used by the Corps. The idea here is to shoot piston-shot grapple-hooks at walls and then reel yourself through the air. Along the way, you're going to want to slice at Titans as they wander past. Too scared to go at it alone? This game has a multiplayer option for you.