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

Destroy a Mr. Raccoon.

Shoot the grenade you fed to an enemy.

Defeat an enemy with a knife.

Use Wooden Boards to board up a window.

Customize a weapon.

Open a dial safe.

Complete the game using 1 or fewer recovery items.

Read all story files.

Complete the game with an S rank.

Complete the game on "Inferno."

Complete the game in under 2 hours of play time.

Gather all the fuses in the warehouse within 5 minutes.