Hot Wheels Velocity X

Unlock HW Prototype 12:
Finish all the missions in adventure mode.

Unlock Upgraded laser:
Finish Challenge 18 in very hard mode

Unlimited ammunition:
Hit minimum 50 Barrels while completing Challenge 18.

Unlimited health: -
Hit minimum 179 Barrels while completing Challenge 17.

Unlimited turbo:
Get 8 Zappers while completing Challenge 4.

Timer speed:
Hit minimum 60 Barrels while completing Challenge 12.

All cars:
Hit 11 Bonus Stunt items while completing Challenge 8.

All worlds:
Collect the Hidden Key while completing Challenge 18.

All gadgets:
Hit minimum 30 Barrels while completing Challenge 7.

Unlock extra stages:
Burnout Glacier stage - Finish adventure 9
Crankshaft Bay stage - - Finish adventure 6
Turbine Sands stage - Finish adventure 3
Underworld stage - Finish adventure 12