MX VS ATV UNTAMED

Bruce
Unlockable: Stickers

To unlock all in-game graphics for your vehicles, insert "STICKERS" (minus the quotes) at the in-game cheats menu.
Leroy
Cheat: One Million Points

At the in-game cheats menu, insert "MANYZEROS" to score a million points automatically.
rholiver93
Cheat: Unlock Everything

To unlock everything in the game, insert the cheat YOUGOTIT into the in-game cheats menu. If inserted properly, everything will be unlocked.
Unlockable: All Handlebars

To unlock all of the handlebars available in the game automatically, insert NOHANDS into the in-game cheats menu.
Robert Holland
Unlockable: FOX Riding Gear

To unlock all FOX-related riding gear, head to the in-game cheats menu and type in the password CRAZYLIKEA.