Probably the best arcade game
I didnt really listen on the story, but i think its about Clyde getting cloned heaps and you have to escape the facility, but while escaping is the fun part. You can go in single or the (proffered) split screen co op. And you'll go through all the puzzles to get past a level. What you have to do is destroy this security devices to let you get through a level, and collect this action figures called Killer Kens (just a side objective) untill you start a next level. You can also mutate into other things, like frogs and chickens, which adds alot more fun to the game.
There is also a multiplayer mode which i havnt fleshed out. So i recommend this to everyone!