Uncover the secret of Arkham City

Defeat all the D.U.P. Secret Agents

Stop the unstoppable

Clear the airwaves

Defeat an enemy using three different power sources

Stand up for the helpless

Destroy all of the D.U.P. security cameras

Answer the call for help

Complete all the Stencil Art

Clear the D.U.P. out of half the districts in the city

Hammer the point home

Complete Showdowns in half of the districts

Destroy half the D.U.P. security cameras