Der Angriff is a mod for registered Wolfenstein, made by Raphael using the alias maximator. It was released on June 5, 2007.
It features 60 levels and many new graphics and sounds. Source code changes include textured floors and ceilings and many new textures. New sounds are also featured, unique to the mod. As Raphael was German, many of these sounds were pretty convincing.
Mapping is generally quite large in size and at times pretty good, and rather extensive.
It is still only available in DOS.