Kill 100 zombies
Kill 500 zombies
Kill 1.000 zombies
Kill 2.500 zombies
Kill 5.000 zombies
Kill 8.000 zombies
Kill 15.000 zombies
Kill 25.000 zombies
Kill 100.000 zombies
Kill 1 special zombie
Kill 100 spcecial zombies
Find a total of 100 survivors
Build a total of 1.000 structures
Get to round 10
Get to round 50
Get to round 100
Complete the nuke story
Complete the science tree
Complete round 1
Invite a friend