Giten Megami Tensei: Tokyo Revelation

A spin-off SMT title released for PC-98 in 1997 that has plot ties to both Shin Megami Tensei and the manga Shin Megami Tensei: Tokyo Revelation.

In 199X, Tokyo was destroyed by ICBMs, resulting in a nuclear holocaust. Some people with foresight had built underground shelters and survived the Great Cataclysm, while demons began to rampage above ground. People in the underground shelters still need to defend against demon invasions, and thus an organization called Devil Busters have formed. Around 20 years passed, and a new generation has grown up in the shelters...