i think a cool game would be protect the base or tower.and the object of the game would be for you to protect the tower for the other players that try to knock it down. :)
another game would be who would be able to do a trick with their whole team. but the whole team would have to do the trick in order to complete the mission. and that is only one of the missions in the game. ;)
if you have any other ideas then post them here. have fun

there should be a bull fight mini-game when ever to vechiles go head to head