(From the back of the box)
The Omega Peace Accords have been violated by the Plexarian Invincibles. Their Bio-transporters have warped into the Earth's atmoshphere and threatened total destruction. The ground trembles, and nature rebels as wave after wave of slime oozes from the heavens.
Can your fleet prevail against the Invincibles? Will the Absorbers contain the deadly slime? Only your superbly trained task force can stop the Invincibles and spell the difference between survival and gruesome annihilation!"