A follow up to the Williams hit Defender, Stargate added a new dimension: the stargate. By flying through the stargate, your ship will be flown to the nearest human being abducted. Carry four humans through the stargate, and you will warp four levels and collect huge bonus points.
Stargate's controls were just as complicated as Defender, yet with the addition of a new button: Invisio. You have Invisio for a brief amount of time (new amounts of time are awarded as you play). When you're invisible you kill each enemy you touch. Very handy for the guppy rounds.
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