I had this interesting idea hosted in Treasure Hunt, where one person is started at the beginning of the level with the required number of gems, and everyone else starts at the end. Then the level is this long path, sort of like a race, and the object of the players without the gems is to assault the player with the gems to steal them and bring them back to the end. Obviously the player with the gems is trying to keep them and get the to the end. I called it "Convoy," after the CW McCall song.