Fortified

Complete any map other than Easy Street without any structure kills

Destroy 10 enemies with the Rifle in 5 seconds

Destroy 5 flying enemies in 5 seconds with the shotgun

Complete any map other than Easy Street using only infantry

Destroy 20 enemies within 1 second

Freeze 10 enemies within 1 second

Set fire to 10 enemies simultaneously

Destroy 50 enemies using Tesla Coils in any single map other than Easy Street

Throw 10 enemies at once with the Cryo Blaster secondary attack

Complete a map other than Easy Street without the base taking damage

Defeat the Juggernaut

Survive 10 waves of Invasion Mode

Defeat the Stalker

Unlock every structure and weapon

Complete every map on normal difficulty

Complete every map on hard

Complete all maps on insane

Reach level 20

Survive to wave 20 in Invasion mode on hard

Reach level 20 with all player characters