It’s unclear exactly why the game is free right now, but it is, so don’t ask questions, and start the download.
The game is not backwards compatible with Xbox One currently, so if you want to play it will have to be on Xbox 360. You can head straight here to grab the game,
The game’s sequel, Witcher 3: Wild Hunt was our 2015 game of the year. For our review of Witcher 2, head here.