Originally released as a Japanese exclusive, this game has now been ported over to be region-free. Works on both EUR and USA consoles.
"The story starts on the planet Lakya where the technologically advanced inhabitants of the planet unwittingly unleash the planet's life force known as Evol. As the released Evol drifts from planet Lakya, it is received by the inhabitants of the nearby planet Cokyo; the people of Cokyo initiate the Shlohe project, a plan to use their captured Evol to develop advanced biologic ships and weapons to invade planet Lakya. The inhabitants of Lakya retaliate the Cokyo invasion by using their own evolving fighter ships."