my first game was halo 3, and I must say, I was very impressed, Halo 3 is a fps, gears is a third person shooter. I personally don't like third person shooters. If it was your first game, I'd say Halo 3, its fairly easy to play the campain, and the multiplayer ROCKS!!! Oh and odst is just an overpriced addon to halo 3, I have that too, I think halo 3 is better because it's cheaper, wait for the price to go down on odst. Gears of war 1 is extremely cheap,you could try that too, and if you don't like it you wont have used much money up. Gears has better graphics. Try out the Call of duty series too, those are good too.