Dark Souls: Prepare to Die Edition Removed Games for Windows Live, Steamworks Added

The update is available now and will let players keep both Save Data and Achievements
Bandai Namco Games has announced that the Games for Windows Live functionality of Dark Souls: Prepare To Die Edition has been replaced with Steamworks functionality. If you played or are currently playing Dark Souls™ Prepare To Die Edition, you will be able to update and keep your Save Data and Achievements. The Save Data and Achievements transfer service is being provided from December 15th to February 16th. From February 16th, the new version using Steamworks functionalities will become the default version of the game.