Grifball is an online video game “sport” played using custom maps and gametypes within Halo 3, Halo: Reach, and Halo 4. Like Capture the Flag and King of the Hill, it is a gametype playable in Halo. Grifball is similar to lacrosse, rugby, or soccer.
It features two teams of four players, armed with hammers and swords. A round bomb (or ball) is placed in the center of the court. At the beginning of each round teams rush to the middle of the court in “tip-off” fashion, to retrieve the bomb. The goal is simple: arm the bomb by planting it on the opposing team’s goal. The game is commonly played with five timed rounds, nine untimed rounds, or one timed continuous round. The first team to reach a majority of points (3 of 5, or 5 of 9) wins.