Germs: Nerawareta Machi (1999)

Germs: Nerawareta Machi is a first-person open world adventure game released exclusively in Japan for the PS1. The only game developed and published by Japanese CG animation company KAJ, Germs stars a reporter who returns to his hometown to investigate a mysterious glowing object, as well as a series of mutations happening to the townspeople that might be connected to it.