Compatible emulators

Synopsis

The Jovians attack the isolated lunar colony of Erriam. It is only defended by a single laser ship, which will likely only delay the catastrophe that would result in the total destruction of the colony.

Waves of around 70 aliens fly over the colony and drop bombs on the various buildings. Your laser can destroy both ships and slowly falling bombs. Destroying each wave will only delay the inevitable, as reinforcements will soon arrive.

At 20,000 points, demon ships will appear and fall from the top of the screen. They will cause significant damage if not neutralized. And at 30,000 points, neutron bombs will slowly float across the screen. You have to defend yourself from them otherwise they will explode and destroy everything.

There are 10 difficulty levels, each affecting the number of aliens on screen, the frequency of bomb drops, and the proliferation of demon ships.

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