Open all of the safes and locks in the game.

Shoot Tyrant's hat off his head.

Expand inventory slots to max.

Escape from the sewers.

Read a letter left behind by Jill.

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

Paralyze a licker's sense of hearing.

Defeat an enemy with a knife.

Increase your inventory slots.

Use Wooden Boards to board up a window.

Open a dial safe.

Make it to the police station.

Eliminate 100 Grunts.