Kill 3 enemies at once with a sub-weapon.

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

Counterattack with a sub-weapon.

Open a portable safe.

Combine two items together.

Increase your inventory slots.

Defeat an enemy with a knife.

Make it to the police station.

Earn all trophies.

Finish the game without saving.

Finish the game using only your knife (no lighter, Defensive Items, and stomping zombie heads).

Finish the game with Jill and Chris.