I don't understand why everyone's giving this game so bad scores. It Doesn't deserve anything near 4 or lower. Ok so the single player wasn't that long but it was defiantly a very good campaign. It defiantly did more stuff than the first one and generally was a better game over the first. It was humorous, very fun and made you think alot. It wasn't as focused on the test and challenges as the first game but instead went more towards story and expanding its universe. Also co-op is really good as well (if you can find the friend). It supports slit-screen too which makes it a little easier. Co-op is fun interesting and worth every single second. Don't listen to the reviews that say its bad, you will have fun with this game, it is better than the first one and its is worth full retail price.
This is not the sort of game that you'd buy as a stand alone title or 'fun', it is nothing without the dead space games and there is little fun to be had within it. There is little actual game play and of this there is little variation. The story line is OK but is a bit annoying as certain fates of characters are unavoidable no matter what story path you take (of which there are four). The game literately only consists of three different hacking type mini-games which have all been done before and cut-scenes that are just moving drawings with audio. The ONLY reason anyone should EVER buy this is to get some back story from the Dead Space universe, a little (tiny) kick before the main event that is dead space 2 comes out. If your a fan of dead space and like to see a little more (like the movies and comics) then sure get it if your really want to. It won't last long, it won't be overly interesting and could leave a slightly bitter taste in your mouth but hey its only a fiver...