GOG offers downloads of The Witcher: Enhanced Edition for Windows and Mac for free via the steps below. That's tied with our April mention and the lowest price we've seen. (It's the best deal now by $10.) To get this deal:
  1. Download the GOG Galaxy client
  2. download Gwent: The Witcher Card Game for free
  3. on Gwent's game page in the Galaxy client, click "Special GOG.com offer" on the right hand side
  4. click "Subscribe & Claim" to drop The Witcher: Enhanced Edition for PC/Mac to free