Party 3D is a mod for registered Wolfenstein, made by Demetrium. It was released on June 12, 2007 via ModDB.
The mod most likely dates from 2005, though it is also listed as being made in 2000. This is impossible, as the files used are based on Wolfenken (RKS file definition) which was only finished in late 2001 or early 2002.
Many traits from Wolfenken remain, though a large number of new, strange graphics appear in addition to some new maps.
Getting the mod to run can prove impossible, as no WOLF3D.EXE is attached; inserting the EXE from aforementioned Wolfenken and using that seems to work fine.
60 levels are featured, but the majority of them are not unique to the mod or new for that matter.