They took out the some of the cool shit that SA had, you can't stealth kill with the knife, no more tatts, and the custom radio stations with commercials and all, but at the same time the game feels a lot more complete than SA did, one thing I wish they'd do is bring in the fight system from Bully, cuz in Bully you can do all sortsa shit like tackle and grapple, I was kind of expecting that to be in GTAIV but it's all good, still having a great time with the game on my 360...