I just want to try to inform anyone who has no clue what this game is about just a little bit because I have had no clue and the trailers and this post don't really help (although the trailers do look really good). I don't really feel like any of this is spoiler material, but if you don't even want to know what the game is about then skip this. I for one was perplexed and have been wanting to know, though.
I only played it a bit at a friends house this weekend, but basically there is this underwater city sometime around the 1950's where there are practically no laws, but something went wrong and now it's a rather dangerous place to be. From what I've heard, it's largely due to people overdoing experimental injections that give them super-powers. So now most of the people there have become mutated monsters. And there are these creepy little kids that suck the DNA out of dead bodies or some such, which are protected by the big robot looking fellers you see on the game covers. Feel free to correct me on anything I'm wrong on, like I said I didn't play much and some of that plot was filled in by the friend who has played it a lot more than me.