What is the code for the dem bones challenge map in the new batman game?

What is the code for the "Dem Bones" challenge map in the new batman arkham asylum game?What is the code for the dem bones challenge map in the new batman game?
I dont know this for a fact but i believe that the code for the challenge map only works once. Im not sure. But hopefully more people will answer.What is the code for the dem bones challenge map in the new batman game?
Each code only works one one account, the only way for you to get it right now is if you have a friend who will give you his account login and you could download it from them, otherwise you'll have to wait for them to release it to everybody...which they will be doing soon.What is the code for the dem bones challenge map in the new batman game?
The codes are exclusive, you can't give them to another. Eidos was clever in requiring the codes to be entered in the PS Store. They work like a PS Card. You can't copy the code.