Kill 20 Enemies by Shooting from the Hip (without aiming)

Explore Photo Mode

Kill 20 Enemies with Headshots

Defeat 20 Enemies with Hand-to-Hand Combat

Get ending 1.

Complete the game on Normal.

Watch all the videotapes in a single playthrough.

Create all items that contain Chem Fluid and Strong Chem Fluid.

Shoot and knock back Marguerite while she's leaping at you.

Increase your item slots.

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

Finish off an enemy with the knife.

Use a lock pick to open something.