As usual, you have to be registered with GOG.com at least since November 2012.
Just post, which titles you would love to win.
Winners will be drawn on 4th of December.
Today is Fantasy Day :)
Majesty HD - Mohdar
Lord of the Rings: War in the North - AFnord
Legend of Grimrock - Zangtesu
Ultima 9: Ascension - mrcrispy83
Unepic - Licurg
Drakensang: The Dark Eye - Cleidophoros
Good luck :)