Back in stock!
Batman: Arkham Asylum GOTY (Game of the year) edition is currently £12.99 at gamestation.co.uk. You can also get 6% Quidco.
The game of the year edition includes the DLC and has support for playing the game with 3D glasses which are included.
Its also available at GAME for £13.99 with 6% Quidco if you wanted to get reward points or just have something against gamestation.