It's a sale. Yes, you know them and love them. Especially if its a great game that you have been waiting for a long time to buy. Today might be the day if you have been waiting to purchase Batman: Arkham Asylum. From now until Thursday the 2009 super hero action game is on sale via Steam.

The title from developer Rocksteady can now be purchased and downloaded via Steam for just $19.99, which is a 50 percent cut from its normal price. And this is the Game of the Year Edition which has a number of new challenge maps added compared to the original release as well as support for viewing the game in 3D via regular red-and-blue 3D glasses.