which game should i buy?

Well Bioshock is immersive but slow for a FPS

I hear prototype has little to no flaws with it but haven't tried it yet its lacking multilayer content.

Kombat Vs DC Soul Calibur like all other fighting games its really about wanting to fight more than anything.

Arkim Asylum is freek'n Epic I had fun with it, so that one gets my vote.

Best way to pick on just see what other people say about them.

I can tell you my opinions and experience with some of the games mentioned.

I played prototype about 50% of the way through (a fairly long game) and it was incredibly entertaining, it can get repetitive but it is definitely worth playing, I would have continued playing and finished the game but when I backed up my save games from all my different games I must not have gotten my Prototype save because I dont have it now :(...

Bioshock looks very good! I might try it on my PS3, I cant fully comment because I havent played it.

Any Mortal Kombat game is always good! I dont know if I would choose it out of those though.

Arkham Asylum is supposed to be one of the top rated games! Go look at gamespot (I will post a link below) and my friend keeps telling me to play it!

Soul Calibur is of course just a fighting game but absolutely one of my favorites! It can obviously get repetitive but It is DEFINITELY a good game!

I am not much into sports games so I personally wouldnt get one.

I really like Prototype A LOT and I am currently playing inFAMOUS which is a very very similar game.

I love shooters so Bioshock I would probably have to play haha.

I would be choosing between those 2 I think if it was ME

As for suggestions: I would be getting Modern Warfare 2, Gears of War 2,

I really like good Online games or VERY good Single Player games.

Fifa 10 all the way man u can create a pro upload ur own image ect and play online and play for a club my clubs ranked 46th in north america:D even though am brittish lol