Hot Wheels: Velocity X

Infinite Health:
Hit 179 barrels in challenge 17 to get infinite health.

Infinite Ammo:
Hit 50 barrels in challenge 18 to get infinite ammo.

Unlock All Items:
Hit 30 barrels in challenge 7 to unlock all items.

Unlock All Worlds:
Find the hidden key in challenge 18 to unlock all worlds.

Unlock All Cars:
Hit 11 bonus stunt items and complete challenge 8 to unlock all cars.