You've got 48 hours to claim your free copy during the Winter Sale.
GOG.com is offering a free copy of the rather great horror game Soma from Amnesia developers Frictional Games as part of their Winter Sale promotion, just head on over to the main page and click on the top banner to lay claim to the game. You have until December 30 at 11 AM GMT to do so.
The Winter Sale promotion also has a couple of bonus games for those who decide to buy any of the 2000+ DRM-free titles on offer, namely Fantasy General (for spending any amount above zero) and Everspace once you've spent 15 USD (or equivalent) in the Winter Sale.
The GOG.com Winter Sale event lasts until January 3, 11 PM GMT.