ES4: Knights of the Nine - Released for PC
Knights of the Nine for the PC has been released through OblivionDownloads and should also be available in stores, catching up with the Xbox 360 version released a week or so back. Here's their description:
A fallen King has been unchained from the darkness of Oblivion to seek vengeance upon the Gods who banished him. Only a champion pure of heart can vanquish the evil that has been released upon the land. You must heed the call, reclaim the lost relics of the Divine Crusader, and return the Nine to glory. New dungeons, characters, quests, and mysteries await.
Information aboutES4: Knights of the Nine