Hi Friends! Here is the cheat code for MX Vs. ATV Untamed.

Acquire Everything:
Input the code YOUGOTIT into the in-game cheats menu.

Acquire FOX Riding Gear:
Navigate to the in-game cheats menu and type in the code: CRAZYLIKEA

Acquire All Handlebars:
Input NOHANDS into the in-game cheats menu.

Get Vehicles:
Get 450 Dirtbike - American Gothic, the roof of the building by the railroad.
Get Buggy - Yucatan Ruins, top of the fountain by the Flag Challenge.
Get Golf Cart - Seaside Links, the left balcony on the opposite side of the building.
Get Snowmobile - Alaskan Tundra, top of the tower by the airplane hanger.
Get Trophy Truck - Bayou Delta, where the time trial finishes in the middle of the water, follow the trail over the land bridge.