Here is your chance to pick up Murdered: Soul Suspect for only $14.95. That's 70% off normal steam/gmg price of $49.95
This offer should stack with a 20%off coupon code that GMG often have running, but since I don't have one to try I can not confirm this.
EDIT: My referral link for GMG $2 for me $2.00 for you, sounds good to me
http://www.greenmangaming.com/?gmgr=komomavi
There are no 20% coupons right at the moment.
The developer for this game caved recently so that's the likely reason for such a big discount on a relatively new game. It's also considered a very short game.