UACWolf was a Wolfenstein 3D project, courtesy of Spifferaneous. The project was underway while Astrostein was being finished, and is a VSWAP replacement that merges the atmosphere of DOOM with Wolfenstein 3D.
No new levels were made, though Spifferaneous mentioned he might be up to the task one day. Never mentioned on the Wolfenstein 3D Dome, it was available for a time on Spifferaneous' own site, along with a dedicated page.