Alternative Deal: DLGamer is $38.99
DLGamer has consistently been the cheapest authorized retailer offering Dying Light at a big discount since release. After purchase you'll receive your Steam key of the game.
Techland has made the "Play as Night Hunter" mode free for everyone due to the pleasant and nice feedback from the land of PC gamers. You now receive extra weapon dockets instead. Details here. This game is also a Steam Play title, which works on both PC and Linux platform.