MX Vs. ATV Untamed Cheats for PSP
Get 450 Dirtbike
Search the top of the building at the railroad tracks in American Gothic for this key.
Go to the Yucatan Ruins at the end of the flag challenge, you'll find the key at the top of the fountain.
Get Golf Cart
At seaside Links go to the left balcony at the other side of the building
Find the key to the snowmobile key by jumping over the tower at the airplane hanger in Alakan Tundra
Get Trophy Truck
At the end of the time trial at the Bayou Delta you will find the key after going over the bridge and following the path. Look in the water.
go to the start page and press R,L,R,L,R,L , X,O,X,O
in this game on the dirt track (were it works the best) if you hold down R the let go then hold down longer you will notice that your speed shots up to 60 which then makes you go faster
When your in free play mode or in a activitie mode, if you hold the L trigger when you begin a race or crashed then let go of the trigger at the right time. You'll find yourself going faster then you usally go when you start. P.s (this cheat works best with the unlocked vehicle's and the fastest 250cc motocycle, 450cc and the 4 wheeler)
The key for te monster truck is one of the pipes hanging from the crane
Go to the excavation site , from the start go straght to you see a big white bridge then find the river and the building with the long arm go to it and the keys on the arm