07-03-2010, 06:16 PM
I'm going to vote Halo since it's had a much more competitive approach to it. Call of Duty has had more releases and probably a more consistent approach to the game series. It's really all about personal preference. I never really played Counter Strike and I don't really like Gears of War. Bioshock is a great game, but it's no where near compared to the attention Call of Duty and Halo have had. Under other, I would go with the 007 series, but again, it doesn't really compare to Call of Duty and Halo, although it's been around much longer.