Assault on Castle Totenhammer (also known as Assault on Castle Totenhammer v0.3 Beta) is a mod for registered Wolfenstein. It was made by Joe Robinson, and was one of the earliest mods to use textured floors and ceilings.
It was only released as a beta. No full version was ever released. It was released on October 3, 2003.
In addition to featuring textured floors and ceilings, the mod also features new weapons and a number of new guards. A lot of graphics have been changed.
Portable medkits also featured, and the score function was eliminated, instead focusing on how many guards the player has eliminated.