The classic RPG game "The Witcher: Enhanced Edition" is now available for free when you register for membership at Ars Technica. Once you've registered and activated your account, go to the linked page and click to redeem your game code, and then activate it at GOG.com
The deal ends around 11pm Thursday NZ Time.
Thanks for sharing this. Can confirm receipt of game code by email and successful redemption on GOG.com. :)