Perplexian Challenger by Steven Luedders of Progressive Peripherals & Software (1983)

Perplexia, an insignificant blue-green planet which exists simultaneously with the earth in a universe parallel to our own, is under attack.

Perplexians are thin-skinned, moon-faced creatures with deep pink eyes, who mill around,, with mouths agape. The perjink permutations of Perplexian society can be percieved by persistent personnel as perpetual perturbation permeated with pertinent persiflage.

The advent of the parallax transporter has enabled physical exchanges between universes. Earth and Perplexia maintain a lopsided defense agreement. Earth is to defend Perplexia from attack in exchange for military bases on Perplexian soil.

His scuminence, Baron Von Schlock, epitome of all things vile and disgusting, has enslaved an assemblage of software engineers, forcing them to program his limitless fleet of robot attack ships. Ships programmed to perpetrate pandemonium upon Perplexians.

Her perplexcellency, Queen Confusion of Perspicacity, has enioined Earth to honor its agreement and defend her peaceful people. Count Conundrum, the enigmatic emissary has recruited you for this Perplexian patrol.

Your weapons are skill, and four models of Perplexian confusion fighters:

• Model I —The oldest Perplexian fighter is lead slug slow. It is noted however for its self-regenerating laser cannons.
• Model II —The military moguls then insisted on a faster ship. In typical bureaucratic fashion, it was built at the expense of maneuverability and the self-regenerating laser cannons.
• Model III —Try, and try again. This model is faster and more maneuver- able but still without the self-regenerating laser cannons.
• Model IV —Right, at last. Mind boggling speed and maneuverability coupled with self-regenerating laser cannons!

Thanks to Bruce Thomas for sharing this.