i say dead rising. gears is one of the best looking and is a great game but i could play dead rising forever.
I say Halo 2 because it was out almost a whole year before all of these, yet it's just as good as all of them. If it came out at the same time, it would own them all. I can also play online for days on end...
Well I have played the original version of it, just never owned it myself. And subsistence has all the goodies.
I voted for MGS 3. Some of those games have only been out for a few weeks. It is unfair for them. You also should have atleast included Twilight Princess if you were including the other new ones.