Complete the treatment plant.

Defeat an enemy with a critical-hit headshot.

Try to push something heavy with Rebecca.

Win a match against the Legendary CPU after being down at half-time

Free the hostages at the Ferris Wheel.

Free the hostages at the Merry-go-round.

Complete the factory.

Complete the laboratory.

Get picked up by the Infected Bat.

Play the piano using Rebecca.

Shoot down a Hunter or an Eliminator while they are jump attacking in the air.

Use a Green Chemical.