Tutorial completed
1000 Infected killed
Level 10 reached
10 missions completed
You've unlocked one mercenary
You've unlocked one skill
You've unlocked one banner
You've upgraded one weapon
You've used an airstrike on the battlefield
You've used a serum to stop an infection
You've installed 500 constructions
You've killed 5000 Infected
You've reached the level 50
You've sucured 10 Money Drops
You've completed 25 missions
