Kill the Butcher.

Use a merchant to repair an item.

Watch all the videotapes in a single playthrough.

Uncover the secret in the old house.

Increase your item slots.

Escape to the yard.

Block an enemy attack by guarding.

Use psychostimulants.

Complete the "Mia" videotape without being spotted by Marguerite.

Obtain something by closely examining an item.

Using a bolt action rifle, kill an enemy Scout in multiplayer

Die for the first time.

Complete Vengeance on Hardened, Veteran, or Realistic.