Lead a band of hired guns to victory in Mercenary Force for the GameBoy. This unique historical shooter, known in Japan as "Tenjin Kaisen," is set in feudal Japan and allows you to control a team of four mercenaries. Instead of a single ship, you manage a formation of warriors—including samurai, ninjas, and monks—each with their own projectile attacks. You can change your team's formation on the fly to adapt to enemy patterns and terrain. Earn money from missions to hire stronger soldiers and heal your squad. With its distinct setting and strategic formation mechanics, it offers a fresh take on the scrolling shooter genre.