In Monster Trucks Mayhem, players are invited to crush the competition into flat scraps of metal in two modes of play. Gamers can demolish their rivals in a "Quick Game" or become the next Monster Truck Master in "Career" mode. Going "Career" means alternating between track races and crunch melees with a selected vehicle. In the mod shop, players can improve the performance of their metal masher by shelling out some cash for better engines, tires, and shocks. Goodies such as nitro and turbo boosts are also available.