From Published Material The SUPER-SUPPLEMENT for both CAR WARS and CHAMPIONS systems. Autoduel Champions is one supplement for two great games. You don't need both games to play - it works with either one! Champions players can now add autoduelling and vehicular combat... for a campaign in 1920s Chicago, the present, or the dog-eat-dog Car Wars world of 2033. And Car Wars players can add Superheroes to their campaigns! Complete Helicopter rules are also included.