Early 21st Century. An incident that rocks the US government takes place. The classified weapon and nuclear-launching bipedal tank Metal Gear has fallen into the hands of terrorists. Seven years after the fiasco at Outer Heaven involving the original Metal Gear, the US government calls in Solid Snake to neutralize the terrorist threat.

In this exclusive Game Boy addition to the blockbuster Metal Gear franchise, you as Solid Snake must use stealth tactics and undercover espionage to defeat the hostile empire. The fate of the world lies in your hands...