Complete the indicated task to unlock the corresponding character.

Character	How to unlock
Alfred Pennyworth	Complete "The Riddler's Revenge".
Bane	Complete "Rockin' The Docks".
Barbara Gordon (Batgirl)	Complete "The Riddler's Revenge".
Catwoman	Complete "Stealing The Show".
Clayface	Complete "The Riddler Makes A Withdrawl".
Commissioner James Gordon	Complete "The Riddler's Revenge".
Dick Grayson (Nightwing)	Complete "The Riddler's Revenge".
Dr. Victor Fries (Mr. Freeze)	Complete "On The Rocks".
Harley Quinn	Complete "A Surprise For The Commissioner".
The Joker	Complete "A Surprise For The Commissioner".
Hush	Rescue all 25 hostages.
Man-Bat	Buyable After Complete "Zoo's Company".
Penguin	Complete "Rockin' The Docks".
Poison Ivy	Complete "Green Fingers".
Ras Al Ghul	Get a 100% game completion by assembling all mini-kits. You must first spend 4 billion studs to unlock the last data item after buying all other data items.
Riddler	Complete "The Riddler Makes A Withdrawl".
Two-Face	Complete "An Enterprising Theft".