

Shin Megami Tensei: 20XX is a Japanese mobile game developed as a prequel to Shin Megami Tensei II, depicting events in Valhalla prior to Aleph's birth.
In the year 199X, the sudden emergence of a massive horde of demons plunged Tokyo into utter chaos. In response, the U.S. ambassador, Thorman, launched an ICBM assault aimed at eradicating the demons in a single decisive strike, inadvertently reducing Tokyo to ruins in the process. Thirty years later, with the completion of the Order of Messiah's Cathedral, the Messiah's triumph was finally assured. As the conflict drew to a close, the survivors gathered within the Cathedral's walls. Over the decades that followed, the former Tokyo was reborn as "Tokyo Millennium." It is here, in the slums of Valhalla, that a young delinquent one day receives a COMP from a mysterious stranger...