Vault 0 citizen

Vault 0 citizens are pre-War citizens of the United States who were kept in cryonic suspension within the Vault... Until the Calculator was awakened. They are encountered in the penultimate mission of Fallout: Tactics.

Background
In order to repopulate the American continent in the wake of a nuclear war, Vault 0 was designed as a super-Vault to preserve the greatest minds of the time and their genetic potential. Once triggered, the Calculator would oversee the recolonization and education of Neo-Americans in a new world. Unfortunately, budget cuts instituted by the Department of Defense, embezzlement of already allocated funds, and poor choice of brains for the Calculator's neural network resulted in what can be best described as catastrophic failure. The brains lost control over the Calculator, inadvertently leading to the beginning of a genocide of the human population of the wasteland at the hands of the soulless machine... While the cryonic pods at Vault 0 malfunctioned, causing the geniuses to suffer irreversible, severe brain damage. Geniuses became broken toddlers, cared for by the automaton - truly the future of humanity.

Appearances
Vault 0 citizens appear only in Fallout Tactics: Brotherhood of Steel.