Finally, which one is the best : Gears of war 2, Killzone 2 or maybe Halo 3

[Zucas]

Well I haven't played KZ2 so can't comment on it yet but on the two I have played definitely Halo 3 and the Halo series in general. If I had to take a guess of how I'd be affected by KZ2 if I played it, I doubt it would go as high up as my liking for Halo 3 or possibly even Gears 2.