As per title, Batman: Arkham City game of the year edition is on sale for $7.50. Applying the coupon:
GMG20-JLKSA-7A8HA Gets it down to $6.
GOTY means it comes with all the DLC: Batman: Arkham City - Game of the Year Edition includes the following DLC: Catwoman Pack, Nightwing Bundle Pack, Robin Bundle Pack, Harley Quinn’s Revenge, Challenge Map Pack and Arkham City Skins Pack.
If you are feeling generous, here's my referral link:
http://www.greenmangaming.com/?gmgr=raxubaji
Excellent deal! and this game was awesome and worth every cent when I bought it at $10