Picking right up where we left off after Thunder Force II, the propulsion units of the lone Styx fighter still warm. We’re off to fight for the Galaxy Federation against the ORN.
This time, they’ve cloaked five planets and concealed their headquarters. It’s your mission to fight your way through and destroy the bio-computer Cha Os, leader of the evil Empire.
Each of the early levels have a theme, forest, fire, water, ice, earth, then once these are conquered you move deeper into the Empire’s lair, including an R-Type style Spaceship levels and its internals.