Gears of War, because even though the multiplayer doesn't have as many options (which can be fixed through the Download Center in the future), it's better than Halo 2's. In Halo 2, if you had a Rocket Laucher/Sniper Rifle or Sniper Rifle/Shotgun combo, you would practically be invincible, leading to lopsided matches. In Gears of War, those with skill still do best, but it works well enough so that somebody who's only just learned how to play won't get totally destroyed by an expert. Plus, all of the weapons are balanced better, too.