"The Dark Eye: Chains of Satinav" giveaway by GOG (via reddit)
Basically, send a PM to reddit user "GOGaway", and they'll PM back a code to redeem the game on GOG.
Giveaway is until 24 January 2014 at 15:59 pm GMT or they run out of codes (40,000 codes).
I got my code within a minute. I have no idea what the game is like.