Pretty much as the title says...one team tries to capture the flag while the other team tries to splatter them.
Offensive team gets unlimited sprint or hologram. Run up to the top of the ramp and grab the flag and bring back to the bottom. You can still sprint with the flag.
Defensive team gets warthogs and mongeese. Just speed down the ramp and run over any attackers. When you hit the bottom, a teleporter sends you back up top to go down again.