Marco Rossi finds a huge building: and he's concentrating the Shotgun ammo in an explosive barrel. Some soldiers are about to surround Marco, and Marco is about to kill one of them using his knife. Through the Heavy Machine Gun, Marco Rossi briefly surrounds Allen O'Neil using lots of air shots. Marco needs to jump accurately to escape of this uncomfortable situation! The enemies are waiting. To continue his task, Marco Rossi must to raise the wall ahead, and he'll do this using some bombs. Marco Rossi throwing another round of bombs, now in the Jumbo Jet: sorry for this, General Morden. Metal Slug Frontal Attack: a good way to beat many enemies and an unusual way to free hostages. Marco Rossi killing a row of parachute soldiers with the acquired Flame Shot: it's a burning strike! An enemy boat are approaching, and Marco Rossi uses the acquired Rocket Launcher to sink-destroy it! Threatened by Rail Tank's shot, Marco Rossi finds some free space to counterattack with the Shotgun. Marco Rossi jumping over some electric barriers and crawling soldiers: he'll continue the mission.

And Metal Slug is suddenly damaged by the huge energy beam fired by a wrecked plane (The Bomber). Riding the Metal Slug, Marco Rossi finds a soldier-protected section: a cannon shot it's enough. and to hit-beat some soldiers too! A missile-shooter helicopter tries to stop Marco Rossi, but he starts a Heavy-Machine-Gun-offensive! Taking advantage of high-damage bombs, Marco Rossi starts to destroy the soldiers' 'headquarters'. After having equipped the Heavy Machine Gun, Marco Rossi starts to hit-kill the first enemy soldier! Marco Rossi using the Heavy Machine Gun to free some hostages.

Strongest weapon in metal slug 1