The Mandela Catalogue is an analog horror YouTube series by Alex Kister, who was seventeen at the time, with its first short released on June 9, 2021. Set in the fictional Mandela County, Wisconsin, it features doppelgänger-like beings called "Alternates" that psychologically torment people into suicide and then take over their identities. It is rendered in the textures of VHS and early digital video.
The heart of the horror is the usurpation of identity. The premise that a being identical to you imitates you while seeking to break you down shakes, at its root, your trust in yourself and in those close to you. Immediately after its 2021 debut it was praised as the scariest analog horror series on YouTube.