Sigh... you post a poll then let us put those games in order?
1. Half Life 2: Great control, great story and one of the best games of all time.
2. Bioshock: Pretty good, I'm not gonna spaz out over it though.
3. CoD 4: Half the reason most people bought it was the low price, then the cheeky bastards turned around and raised it after it became a hit. GOTY editions should be CHEAPER than the original, not more expensive. It was fun and it brought a dead franchise back to life.
4. Halo 3: meh...
5. Gears of War 2: haven't played the second one, but the first one didn't really stand out too much. based off the first game I would put it on the bottom of this list.