Hellboy: The Science of Evil
In The Science of Evil, Hellboy has several abilities that set him apart from the standard brawler character, including the ability to pick up and wield many environmental objects such as barrels and debris from structures knocked down with his Right Hand of Doom. He can also grapple enemies to finish them off one-on-one, or use them as projectiles.
Team up with a friend and attempt six co-op multiplayer levels over ad-hoc WiFi. These levels are derived from the single-player campaign, but have been shortened and re-worked to provide a set of two-player puzzles. Scores are tracked individually - so it doesn't have to be completely co-operative.
Hellboy: The Science of Evil was also released on the Xbox 360 and PlayStation 3, however the PSP version is not a port of that game. The story elements and characters are similar, but the PSP features a unique combat system, different AI and a new level layout more suited to the handheld environment.