Kill 1 zombie

Kill 2.500 zombies

Kill 10.000 zombies

Max a tower

Build a tech center

Research a new tower

Complete the tech tree

Build an arms factory

Use a super weapon

Use 4 different super weapons in a single mission

Earn 1 perk

Earn 5 perks

Earn all perks

Call an early wave

Build 50 towers

Build 100 towers

Build 500 towers

Win a mission without building a tower

Take a screenshot

Heal a crew member

First special force

10 special forces in one mission

Kill a mutated crew member

Kill 20 zombies in FPS mode

Build the lander shield

Kill 25 zombies at once by nuke

Kill 200 bomber by laser tower

Deactivate 30 electro shields by tesla

Extinguish 20 pyro zombies by freeze ray

Stop 10 runner zombies by freeze ray

Analyze all monoliths

Use all monoliths in mission 20

Complete the campaign

Complete all missions of the campaign in challenge mode

Unlock all achievements