It seems the trend of sudden and short sales has made it's way to consoles as Sony is having a sale on PSN this weekend only. Here's a link to what's on sale. https://store.sonyentertainmentnetwork.com/#!/flash-sale/cid=STORE-MSF77008-9_FLASHSALEDEC13?twtp_mcc_imgp
Personally I think the highlights are probably the two Batman games, XCom and Tearaway. Now I agree with Jeff Cannata from today's Weekend Confirmed for feeling dumb about paying $35 for Tearaway. Retailers dropped it to $20 quick because it was not selling at all and now even Sony is selling it for $18.