Kult: Heretic Kingdoms & OST Free for early adopters.
If you purchased Shadows: Heretic Kingdoms before the game’s price-drop on 27.08.2015 – the devs want to say thanks.
That token of gratitude? Games Farm is giving free access to the original Kult: Heretic Kingdoms along with the Shadows: Heretic Kingdoms OST, thus enhancing all existing copies to the Deluxe Edition.
If you’re one of the lucky owners, you can find your redeemable bonus key by heading to My Account and opening Shadows: Heretic Kingdoms on your Game Shelf. You can redeem the code on gog.com/redeem. If you already own part of the package, you can redeem one of the items and share the code with a friend.
Source:: GOG – Good Old Games