The Official Nintendo Player's Guide (1987):
THE WARMONGERS OF TETRANOVA
In the far away galaxy of Tetranova, a fierce war between seven stars has given new meaning to the worlds "cutting your nose off to spite your face". For the long years of battle have rendered the planets, for all practical purposes, dead. Calling a temporary truce, an alliance is formed. The goal of the Seven Stars Alliance is to search out and claim a new home rich in resources. Their plan is to rebuild their strength and take control of a planet. Unfortunately, the planet that meets their criteria is Earth!
GAME PLAY: The fate of the Earth is in your hands. Using an arsenal of super-tech weapons, you must pilot the fighter ship SYD against the deadly fleet of the Seven Stars Alliance. With wide-range lasers, homing devices, paralyser beams, nuclear warheads and thunder and power on your side, you must fight, often at warp speed, until every last Koros, Ammon, Yakuuto, Novo, Folfu, and countless other invaders are totally destroyed. Will SYD be vicious enough? Or will the Seven Star Alliance ruin the neighborhood? Blast off and find out!
Contributed by Joshua J. Slone (4621) on May 08, 2004.