This is the second and last Vector based game ever produced by Centuri.

Here is a copy of an original game proposal document by Tim Stryker : Defend the starbase from alien invaders (sounds really novel so far, right?). Ship is maneuverable in two dimensions, has laser weaponry, and can use radar to locate menacing planetoids and enemy squadrons. Enemy squadrons come in two flavors : slow, Space-Invader-like phalanxes of twenty to forty ships bearing rockets, and fast, elite loners bearing lasers. Field of play (the simulated 'universe') is considerably larger than what can be seen on the screen at any one time : the player's ship is always displayed at the center of the screen and only 'sees' the portion of the universe within a given radius about its current position. Enemy ships attack from random points around the compass, bent on destroying the starbase, but will engage the player's ship if it presents itself. Ship has limited fuel and laser energy, but may return to starbase to refuel and recharge at any time. Points are awarded for each enemy craft destroyed, and are deducted for each defending ship lost. Game ends when starbase is destroyed by enemy; limitation of playing time is achieved through gradual escalation of enemy attacks.

Tim committed suicide in the Blue Mountains of Colorado in August of 1996 for unknown reasons. On the night of Aug. 6, Tim Stryker, 41, pulled off a remote road in the Blue Mountains in northwest Colorado, stepped out of his car, put a shotgun to his head and pulled the trigger.

Dennis Bartlett holds the official record for this game with 142,390 points on February 11, 1984.