Den-ou Suikoden (1987)

Game is based on the classic Chinese four-book epic "Suikoden" and uses the same character in an original story. Three scenarios are available from the start and upon clearing them the fourth one opens up. One of the stories starts with two journalists investigating a strange get into an ambush. One of them gets a strange disease that kills in two months time. To get the cure it's needed to break through three gateways and reach the peak of a mountain.