Well I bought This game soon after it came out and i never regretted it. the story is great it has 2 endings depending on what you do
and most of the achievements are easy to get. I would recommend this game to everyone (except little kids cause they'll be scared)
I just finish getting all the achievements and passing the whole game again it was pretty fun. and Bioshock 2 is coming soon as well XD

Bioshock has a great story and is definitely worth a rent at least. The graphics are top notch, especially the water which looks cool.
If you play through this game you have to have a very agressive attitude in my opinion to enjoy it, as in if you take baby steps through the entire game it can get tiresome. Take my advice and when you play this try not to get caught up in the addictive world of hacking and taking pictures of everything lol. Not that you shouldn't!! It's just it can slow you down considerably.
Only really bad thing about it is you get the feeling your the only sane person around for miles as everything is out to kill you, and the lack of contact with non-spliced people doesn't help either.
WARNING: PLAYING IN THE DARK WILL RESULT IN POOING OF ONES SELF

well...

actually i only played the demo...
and to be honest even in the demo it scared the shit outa me...
but the graphics looked good, story line was good....
u couldnt get lost but still u could walk around much enough so that it would seem that it is a free roaming game....

so...
if u want a good game... i reccomend this one