Darkenstein v1.3 is a mod for registered Wolfenstein, made by Dan Young. It was released on January 13, 1997.
Many graphics have been changed, mainly in a slightly cartoon-like vein. Some block objects were replaced by actor frames, making quite a challenge for the player to navigate through.
10 new levels are featured on the first episode. The download came with an extensive Read Me and a self-extracting batch file.
Young ran his own Darkenstein site which is still active.