Grifball = game variation type of Assault (plant the bomb) on Foundry (DLC needed).

2 teams of 4 with a bomb placed in the middle of a flat arena map with 2 goals on each end of the map. There's nothing but 2 teams in an empty warehouse.

You're armed with hammers and swords and you gotta plant the bomb in a goal to win. It's like American Gladiators' Powerball, but with Halo.

Respawn times are down to 2 seconds and you always drop in the same location.