Stage 4 finished
Fuel tank upgrades bought
All hidden chests collected
All upgrades on all cars bought
Stage 6 finished
All levels completed
2000 zombies killed
500 barrels exploded
Earned over 100 000 coins
Earned over 100 gems
Collected reward for completing 10 quests
Steel Pass claimed on 3 cars
Finish stage 4
Finish stage 6
Collect all hidden chests
Buy all upgrades on all cars
Complete all levels
Kill 2000 zombies
Blow up 500 barrels
Earn 100 000 coins
Earn 100 gems
Collect reward for completing 10 quests
Claim Steel Pass on 3 cars
Buy both fuel tank upgrades
