The Secret of (REDACTED)

The Secret of [REDACTED] is a single-stage overseer quest in Fallout Shelter.

Behind the scenes
The mentions of "23 skidoo" and "Discordia" as well as the overall theme of conspiracy are probably a reference to the religion of Discordianism and The Illuminatus! Trilogy which is a series of novels exploring said religion.

Gallery
El secreto de (CENSURADO) Тайна (ВЫРЕЗАНО ЦЕНЗУРОЙ) Таємниця (ВИРІЗАНО ЦЕНЗУРОЮ)