Complete Region 2
Complete Region 1
Complete Region 3
Complete Region 4
Acquire all gun of Region 1
Complete Region 5
Acquire all gun of Region 2
Acquire all gun of Region 3
Acquire all gun of Region 5
Acquire all gun of Region 4
Upgrade a gun to max level
Buy a shotgun
Reach rank 20
Acquire 1,000,000 cash
Complete all achievement
Mad Zombies Default
Headshot 2000 times
Kill 100 zombies
Headshot 5000 times
Headshot 10000 times
Kill 1000 zombies
Kill 500 zombies
Kill 5000 zombies
Kill 10000 zombies
Headshot 1000 times
Headshot 500 times