Bioshock in 2007 was the number one best seller for the Xbox 360. Sells sky rocketed after the first week, rumor got around that it had a great story line and some of the best graphics people have ever seen. Bioshock wasn't for multiply or online.
The story line goes:
Your planes crashes in the ocean. You find a mini ship and take it under. Once under he finds a whole new world with monsters and lots of other stuff
personly Bioshock was a great will spent couple days playing it. Nothing like i played before. Different charators and different placement. I think Bioshock did so good because it was totally diffenet from anything out at the time. surely after Bioshock come out more games produced and tryed to copy it