Truck Jam, the most real Off-Road Truck racing game, is here for your iPhone 3G, iPod touch and iPhone 4 with Retina-Display support! 

No Rules and No Boundaries, racing is pure fun. Find yourself behind the wheels of off-road trucks and play with realistic but most enjoyable tilted or tapped game control!

Don't look for boundaries like in other racing games! Truck Jam doesn't limit the area. You can really drive as far as you wish across the varied terrains without any limitations.
You can also listen to numerous licensed rock tracks during the intense races.

Challenge your opponents on icy mountains or hot sand dunes and experience the excitement of hill climbing with custom build off-road trucks!

JAM MODE
High-speed dash to race through a series of gates placed randomly on the terrain.
Be the first to pass a gate and earn more points in more difficult modes.

OFF ROAD RACING MODE
If you are a more traditional racing fan, Off-Road Race mode will give you high-octane excitement.
Rocks, potholes, mud holes, trees and various objects will turn your route into adventurous victory.
But often the more daredevil driver will succeed over those who opt for strategy!

ROAD RACING MODE
Pedal to metal lap based race on the bumpy roads where you must go through a sequence of gates.

FREE RIDE MODE
Explore the map and put your trucks to the test alone or with AI cars.

VEHICLES
9 custom built off-road trucks are waiting for you, each with different performance and driving characteristics. Two of them can be bought in-game though career mode can be finished without them.

MAPS
Eight unique tracks are available such as green fields of Europe or Sand-dunes of Africa or the American rock-deserts.

MAIN FEATURES
★ full screen retina display support
★ non linear career mode with tens of events and unique challenges
★ no limits, no track boundaries
★ high detailed 3D graphics
★ real but enjoyable physics
★ realistic off-road vehicle characteristics
★ various difficulty levels
★ collect-able truck components
★ high score and best lap time records
★ several game-modes
★ unique paint jobs
★ detailed grass and tree rendering
★ intelligent opponents
★ licensed music tracks
★ various camera and control modes
★ OpenFeint support fall all game-modes
★ tens of primary and secondary objectives
★ in-game statistics

Source: http://itunes.apple.com/us/app/truck-jam/id394077788?mt=8