Unlockable List:
Get first place in season four of career mode in the power division: Dodge T-Rex 

Get first place in the first three seasons of career mode in all of the divisions: 
Humvee 

Complete 36 tracks in single race mode: Monster Truck 

Run over 9 Blue Moon Cafe signs in free roam or career mode: Moon Buggy and 
Moon Level 

Complete the first nine tracks in single race mode: Pro-Class Trucks 

Get first place in all divisions in career mode: Rod Hall Hummer 

Get first place in season four of career mode in speed division: Shelby Dodge 
Durango 

Complete the first twenty-seven tracks in single race mode: Unlimited Class 
Trucks  
 
Bonus Mercedes Off Road vehicle:
Enter MERCEDEZ as a name.

Low Gravity:
Enter LOWGRAVY as a name.

Super fast flips and spin in air:
Enter KAHNDAWG as a name.

Climb most hills without slow down:
Enter DNOMAID as a name.

Add one lap to already set number of laps: 
Enter 1LAPS1 as a name.

Add two laps to already set number of laps: 
Enter 2LAPS2 as a name.

Double time on Blitz races:
Enter DBLTIME as a name.

Unlimited retries:
Enter FREEPLAY as a name.

All opponents driving the monster truck: 
Enter MONSTRUS as a name.

Controlled landing:
Hold R after a jump, then use the Left Analog-stick to steer your descent. 

Flip or barrel roll:
Go off of a large jump and when in the air, hold R (default controls) + Left or Right 
to do a barrel roll. To flip, hold R + Up or Down. 

When you are in the air from a jump, press the Right Analog-stick in any direction. 
You will flip in the same direction.

Get up to 187 mph:
Use the Rod Hall Hummer and go down a hill or get into the air. It will go 187 mph.

Top speeds:

Special cars:

Rod Hall Hummer: 190
Shelby Durango: 162
Monster Truck: 147
T Rex: 126
Humvee: 125 
Stock
Mercedes: 113
Durango: 112
Ram 2500: 110
F150: 110
Silverado: 104
Avalanche: 104
Blazer: 101
Hummer Soft Top: 101
Wrangler: 101 
CJ5: 100
Hummer Wagon: 100
Bronco: 99 
Modified 
Mercedes: 133
Durango: 130
Ram 2500: 126
F150: 126
Silverado: 119
Avalanche: 115
Blazer: 114
Hummer Soft Top: 113
Hummer Wagon: 112
Bronco: 110
CJ5: 102
Wrangler: 101 
Pro 
Durango: 147
Mercedes: 147
Ram2500: 141
F150: 140
Silverado: 136
Avalanche: 128
Hummer Soft Top: 125
CJ5: 125
Wrangler: 125
Blazer: 124
Hummer Wagon: 124
Bronco: 121 
Unlimited 
Durango: 168
Mercedes: 168
Ram 2500: 161
F150: 157
Silverado: 155
Avalanche: 142
Blazer: 138
Hummer Soft Top: 138
Wrangler: 138
Hummer Wagon: 136
Bronco: 132
CJ5: 132 
Fastest three
Rod Hall Hummer: 190
Durango: 168 
Mercedes: 168 

Helicopters and hang gliders:
Helicopters and hang gliders will fly right through you and cannot be destroyed. If 
you hit one while in the air, you will go through it.

Moab: Knock down rocks:
When first starting out, go straight until the first larger hill. Go to the left and look 
for a rock structure that comes to a point and a big ball of rock at the top. Drive 
up the low angled side and go directly into the rock. It should fall down into the 
crack to the left side. This cannot be done in multi-player mode.

Moab: Drive on arches:
Drive around until you see a large arch and try to drive up it. You need a power 
vehicle, such as the Moon Buggy, the Hummers, or the Monster Truck to do this. 

Moab: Go over large hills easily: 
When using the freeroam option, use the modified Jeep Wrangler to go over large 
hills.