Monster Trucks Nitro 2 for iOS Was $2.99, Free

Key features:
•Ride high in the Pickup, 6-Wheel ATV, Rocket and MAC Monster Truck
•Fully dynamic, three-dimensional environments
•Wreck cars, demolish track structures, run over trees; destroy just about everything that stands in your way!
•28 thrilling tracks with three different sprint levels for each
•Player Achievements, Friends Leagues and Global Scoreboards
•Experience bigger sounds and more spectacular crashes on the latest iPhone and iPod Touch devices!