Stunt Timer - Two or more people have to try to do the most, and best stunts before the timer runs it. this could be actually quite easy, considering you earn money from doing stunts, so we could easily just say the people with the most cash earned by stunts win.
Team Stunt Timer - Same as above, but there are teams, and the teams scores are added up together.
All out racing - Grab some cars, race to the finish line, the person who makes it past a certain point fastest wins.