Keep the bridge together

Get the trains running again

Ride Rhino through the mall

Complete Mission 1

Parry 100 enemies

Get ending 1.

Complete the game on Easy.

Watch all the videotapes in a single playthrough.

Uncover the secret in the old house.

Fight off Marguerite while she wanders the old house to make her run away.

Increase your item slots.

Escape to the yard.

Use psychostimulants.