Ghost Betrayal is a mod for registered Wolfenstein, made by Joshua Waight. It was released on January 2, 2007.
It features 8 levels (though 11 levels appear in the map files) and plays in the Wolfenstein Collection EXE. Many graphics have been changed (many of these come from AReyeP projects), and photographs of real-life people are included as textures.
Music of a more contemporary taste is also featured, including bands Metallica and Linkin Park.