Firefight can be played cooperatively with up to three other players via system link, or Xbox Live or with up to 2 players on the same console in splitscreen mode. Players start Firefight with only the Rookie as a playable character; completing the campaign mode unlocks other characters and maps.
Players are awarded medals for making special kills, and individual and team scores are tracked throughout the games. Inside Firefight, players have a shared pool of seven lives, which are replenished after completing five rounds.
It's just plain awesome, pretty much the best(in my opinion) Halo game mode.
B: What we're not firefighters
A: No stupid like firefight the underground tourny
B: Dude i heard you need a shit load of cash and people die from it. I thought you need a invitation too.