Thunder Force III is a scrolling shooter game developed by Tecno Soft. It is the third chapter in the Thunder Force series. It was released in 1990 in Japan, Europe and the United States for the Megadrive/Genesis game console. During the same year, it was retooled into an arcade game named Thunder Force AC. In 1991, Thunder Force AC was ported to the Super Nintendo Entertainment System, and was renamed Thunder Spirits (presumably because the Thunder Force franchise was associated with Sega).
In September 2016, at the Tokyo Game Show, Sega announced that they owned all the intellectual property rights of Tecno Soft. To commemorate this, Sega re-released Thunder Force III in 3D as part of Sega 3D Fukkoku Archives 3: Final Stage (Sega 3D Classics Collection 3) for the Nintendo 3DS.
The game was later included as one of the games bundled with the Sega Mega Drive/Genesis Mini.
The ORN Emperor has been transferred to a different location through the five subspace transfer systems that exist on the five planets of the ORN System (Hydra, Gorgon, Seiren, Haides and Ellis), so it became impossible to locate and attack it from normal space. Many times we have tried to send armored divisions to these planets, but none of them succeeded because of ORN's powerful unmanned defense system "Cerberus".
For this reason, the Federation has made an all-out effort to develop the highly mobile fighter Fire LEO-03 "Styx", which is small enough to pass undetected by Cerberus and has a firepower comparable to that of large battleships. The pilot chosen for this mission is Captain Jean, grandson of the hero Edra of the battle against Dyradeizer, and the navigator is Lieutenant Sherry, daughter of the hero Reid of the Plealos destruction operation.
The fate of the Galactic Federation is on their hands. Will the Galactic Federation finally end this war after 100 years of battle? Will the ORN Empire prevail? And will peace return to the galaxy?
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