Dragonborn just became available for pre-purchase
on Steam, and will be available for playing February 5th. Grab it now for 20 $/€!
In case you don't know what Dragonborn is all about yet, here's a small description for you:
"With this official add-on for The Elder Scrolls V: Skyrim, journey off the coast of Morrowind, to the island of Solstheim. Encounter new towns, dungeons, and quests, as you traverse the ash wastes and glacial valleys of this new land. Become more powerful with shouts that bend the will of your enemies and even tame dragons. Your fate, and the fate of Solstheim, hangs in the balance as you face off against your deadliest adversary – the first Dragonborn."
Thanks to Camonna Tong for the find!