Batman Arkham Asylum GOTY DLC - Play as the Joker and Prey in the Darkness for Windows on Steam

- Adds Play as the Joker challenge maps to the PC version
- Adds Prey in the Darkness challenge maps to the PC version
- Adds all previously-released DLC to the PC version
- Based on files on the OSX version of B:AA

NOTE:
- Only original Steam GOTY version is supported!
- If you want your Steam install of the game to be detected launch the game first just to be sure.