Suikoden Demon Century(1993)

Knife... Sword... Gun... The Deadliest Weapon of All... ...Is the Human Animal

In the early 21st century, an earthquake destroyed Tokyo. Japan lost its center of government and industry, and turned into a lawless territory. Looking for his sister, Takateru Suga learns that she was kidnapped by the powerful Koryukai gang. He decides to ally himself with a drag queen, two ex-mercenaries and a nun to destroy the crime organization and save his sister!