Lightening Force: Quest for the Darkstar

Outside North America, it is known as Thunder Force IV. You must lead the fight against the evil Lohun Empire. Their computer system is out to destroy the defenses of your galaxy federation. Lead the attack on their heavily defended military planet. Take out the planet's command center to pave the way for the invading forces. Take the fight underwater to destroy giant naval battle cruisers. Shoot magnetically charged photon beams at the aliens' bio-machines. Snake your way through the labyrinthine structure of the enemy bio-base. There you will encounter your final target, the destructive regeneration computer. With the thunder sword, your strongest energy beam, you fight against this ultimate weapon!