For sure Halo, you just can't beat Halo's multiplayer. If you want something like gauntlet but not gauntlet, try D&D Heroes. It's four players, and it's a pretty good game. Though it's a different type of game, Burnout 2 or 3 are both really fun multiplayer games, and they are good entertainment for a few hours. Gladius is a really good multiplayer game if you like strategy and combat. Freedom Fighters is fun, too. Mechassault is really fun if you are doing system link with two TVs and two Xbox's, other than that it's only two players though. I didn't like Crimson Skies all that much, but most people I know really like it, so maybe that would work. Also, but mind numbing multiplayer mayhem, you gotta go with Serious Sam. Imagine gauntlet with about 10 times the enemies, in big areas, FPS style. It's great. Hope that list at least got you started. Have fun