Wolfwall is a mod for shareware Wolfenstein, made by S. Smeijers. It uses version 1.0 and most likely dates from either 1992 or 1993, though it was only submitted to the Dome in May 2001.
It features only a new VSWAP which adds more blood and gore to the walls, but not the guards.
Using version 1.0, it is only available in DOS.