Find the indicated numbers of hidden Rockstar barrels (collectables) to unlock
the corresponding cheat option. Note: Enabling a cheat will stop your progress
in Career mode and disable the earning of money and reputation from races.

Unlimited Nitro: 10 barrels 
Never Damage Out: 20 barrels 
Unlimited Special Abilities: 30 barrels 
Top Down View: 40 barrels 
No Police: 50 barrels 
No Fines: 60 barrels