Zone Xi "Great Fortress II" is stage 5D of the game. Like its name implies, it is a space fortress similar to Zone Mu. Zone Xi splits in Areas X' and W'.

The boss of this stage is a mechanical Anomalocaris called Accordion Hazard.


As Accordion Hazard explodes, the Silver Hawks merge into a giant silver hawk (the bird, not a ship) which flies to the stars.

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