Grifball
From Halopedia, the Halo wiki
"In 2552, the Red Army introduced Grifball to the world. By 2557, all other sports had been abandonded."
Grifball is a new home made game type made by the RoosterTeeth personell. It is an assault variant, on a large empty room in Foundry. It is named after a Red vs Blue character, Grif. Sarge, his commanding officer, refers to Grifball during the fouth season of Red vs. Blue when he, Simmons and Donut and trying to snipe Grif of the ledge saying "This is the best game since Grifball". It is supposed to cause the grif (the orange person holding the ball) pain, as the other players try to kill him. the person wearing the ball is orange, because that is also Grif's armor color in the Red vs Blue series.
It is a form of Assault.
Rules
Grifball is a simple game. Two teams of 3-4 players square off in a simple arena in which each team has a goal. The object is to take the ball in the middle of court and put it in the other team’s goal.
1. Scoring a goal earns one point and ends the round.
2. Each match consists of five rounds. The team with at least three points at the end of five rounds wins the match.
3. Each player has a gravity hammer and an energy sword (secondary).
4. Damage is set to 300% with player health set to 10%. One direct hit will kill a player.
5. Dead players respawn in three seconds at their own goal.
6. The ball carrier has a 3x Overshield, 150% speed and turns orange.
7. Friendly players can hurt each other. Learn to use your radar.
8. In the unlikely event that a player finds themselves thrown outside of the arena (beyond the wall), find a teleporter. It will drop you out in the middle of the arena. Play is not suspended when a player goes out of bounds. It is your duty to return to play.
9. If a ball carrier goes out of bounds, the must return to play within 30 seconds (judged by time on Save Film) or they forfeit the entire match. If they leave the ball beyond the wall, it will reset within 30 seconds. Play is not suspended while the ball or ball carrier is out of bounds.