Team Slayer

Team Slayer is the same game mode as Slayer, except the players are divided into teams. Team Slayer is also a social and ranked matchmaking playlist in Halo 3, and plays with the same rules and variants as Team Slayer.

In Custom Games, there are actually eight possible teams a player can be on, divided into colors: Red, Blue, Orange, Green, Brown, White, Grey, Purple. Other rules can also dictate the win conditions (by default, first to 50 kills for one team - this can be changed, as well as other variations such as making each player on a team get a minimum number of kills for the team to win).

Shotty Snipers
Players start out with a Sniper Rifle and a Shotgun. There are no weapons on map except Grenades.

Team Snipers
Players start out with a Sniper Rifle and a Magnum. There are no weapons on map except Grenades.

Team BRs
Players start out with a Battle Rifle and an Assault Rifle. Everything else is normal.

Team Rockets
Players start out with a Rocket Launcher that has unlimited ammo. There are no weapons on map. This variation is only played in Social Slayer.

Team Duals
Players start out with an SMG, all weapons are replaced with dual-wieldable weapons.