Die to a Boss.

Deliver the harp string to Edd

Reach Crusader's Landing

Unlock the Health upgrade I perk

Shoot a zombie dog or a licker out of the air.

You helped the turtles to the sea.

You made someone feel better.

Destroy a Mr. Raccoon.

Paralyze a licker's sense of hearing.

Customize a weapon.

Defeat an enemy with a knife.

Increase your inventory slots.

Counterattack with a sub-weapon.