Revenge of the Battle-Cars is downloadable content (DLC) for Rocket League game. Rocket League is a physics-based multiplayer game combining car racing and soccer. This add-on includes 2 new (but classic) Battle-Cars, Scarab, and Zippy. You also get 6 unique Decals for each new Battle-Car (12 total), 3 new Paint Types, 2 new Wheels, 2 new Rocket Boosts, 4 new Toppers, and 2 new Antennas.
