Suikoden Demon Century

It is said that the warriors from two ancient powers would be resurrected in modern times to continue their fight. Sometime in the near future, Tokyo has been reduced to rubble. The gangs, controlled by a crime syndicate, have taken over the streets and only the toughest can survive. One man, Takateru Suga, must infiltrate deep into the crime cartel to save his sister, who has been kidnapped by the crime syndicate. (animenewsnetwork.com)