The following video details the locations of all 23 Hans Volter Dolls, of which 10 must be destroyed for the "Cult of Personality" achievement in the Killing Floor 2 Halloween 2023 event map, Castle Volter. The locations of the 10 valve switches for the seasonal event objective, "This belongs in a Museum", to unlock the hidden trophy room are also included.

The video details the locations in a single continuous route.

Video timestamps:
00:00 - Hans Volter Dolls 0-10
01:57 - Hans Volter Dolls 11-23