Microsoft is cleaning out its digital shelves with a sizable sale on Xbox 360 games and add-ons this week. Ending April 21, the sale spans 11 games and hundreds of pieces of DLC. Five of the games feature popular DC comics superhero Batman in some capacity, such as 75 percent off both Batman: Arkham Asylum and Arkham City through Games on Demand ($4.99 / £3.74 / 4.99 euros each). Additionally, Injustice: Gods Among us is half-off ($19.99 / £17.49 / 24.99 euros), Lego Batman 2 is 67 percent off ($6.59 / £4.94 / 6.59 euros) and XBLA game Gotham City Imposters is 75 percent off ($3.74 / £2.49 / 3.59 euros). All of the above deals are valid for those with a paid Xbox Live Gold subscription.