Dead Sky achievements

Go 4 rounds without taking any damage and kill at least 40 zombies within that time.

Hit 10 enemies with a single railgun shot

Defend the objective 500 times

Kill 50 zombies using the Electro-shield upgrade in a single game.

Do more damage than all of your teammates combined in a 3+ player game that lasts at least 4 rounds.

Last 6 rounds without building any turrets or fences

Kill Deadmass using the med gun

Purchase all of the available upgrades in a single game

Kill 20,000 enemies

Survive a night without using your flashlight while still killing at least 10 enemies.

Build 500 structures

Kill 7 enemies using a single air support powerup