Church of Harold

 The Church of Harold is a cult formed around the worship of a mutant called Harold active on the West Coast 

Harold's Cult
One of the pieces of concept art for Fallout 3 by Adam Adamowicz that were released after his death, was called "Harold Cultists". The piece showed three characters dressed in what appears to be clothing made of all-natural resources. One could speculate on whether the amount of clothing the three characters have represents rank in the cult.

Gallery
A Church of Harold brochure.

Appearances
It was to appear in Interplay's original Project V13 - also known as Fallout Online. They also appear in The Armageddon Rag, Vol. 2, the newsletter leading to the project. Fallout Online was abandoned in favour of a new, unrelated, Project V13.