A deadly game of hide and seek

Uncover the secret of Arkham City

Stop the unstoppable

Clear the airwaves

Hammer the point home

Answer the call for help

Purchase 5 weapons.

Attempt "The Rescue" and survive.

Infected 13 times (lifetime)

Fully upgrade all abilities for one character class.

Complete the fifth mission of the U.S.S. campaign.

Kill an infected teammate with a headshot before they become a zombie in any mode.