How to enable Big Head mode

batman-arkham-city

In Batman: Arkham City, there is apparently a secret big head mode. How is that mode enabled on each platform?

Best Answer

Kotaku describes how to access this easter egg:

It's very easy to do. You have to [have finished the game] on normal or hard, or on New Game+ (Which you can't unlock by completing the game on easy, anyway.) At any point in the game, take out Batman's Cryptographic Sequencer. While holding down both RT and LT (or, I presume, R2 and L2 on PS3), begin to rotate your left thumbstick clockwise and your right thumbstick counter-clockwise. After doing that for a few seconds, you'll notice that the Dark Knight's chin has gotten a good deal…chinnier.

You can also watch the Rooster Teeth video (great channel for achievements and easter eggs, by they way!):

On the PC, it's a bit different. You don't seem to need the cryptographic sequencer. The key combination is:

U,U,U,D,D,D,L,L,R,L,L,U,U,D

or in WASD:

W,W,W,S,S,S,A,A,D,A,A,W,W,S

And here's a video: