I've played and beaten (and greatly enjoyed) both. GOW2 for the 360, obviously, and GTA IV for the PS3.Depends on what kind of game you're looking for. Both have very cool campaigns, but are on the opposite ends of the spectrum. Gears is a standard "straight line" shooter - great shooting dynamics and gameplay, but extremely linear. If you're looking for a competitive third-person shooter, it's great. GTA IV has a lot more exploration, and it's a sandbox game - as you already know - so it's a lot less linear. But the shooting dynamics and gameplay are significantly weaker than Gears.If you're only going to be playing single-player, GTA IV is probably the better bet. It will keep you interested longer, and you can decide to quit the storyline altogether and just dick around if you so desire. Is it me or on gears of war 2's campaign on Hardcore really easy?