Use psychostimulants.

Escape from the ship.

Uncover the secret in the old house.

Escape from the guest house.

Take down two or more enemies with one shot.

Complete the game on Madhouse.

Complete the game on Easy.

Destroy a Mr. Everywhere statuette.

Complete Not a Hero on Easy or Normal difficulty.

Destroy all Mr. Raccoons hidden in The Ghost Survivors mode.

Craft an item.

Follow Nicholai deeper underground.

Defeat zombie Brad.