Stargate though named the same is related to the Stargate Franchise.
Stargate features a twofold mission where the player needs to destroy the aliens in the first place and the second is to protect the human beings from being enslaved by the aliens.
Stargate features 15 aliens along with ten humanoids. The player is equipped with a beam-like a weapon that can be fired rapidly in the form of a long horizontal beam ahead of a spaceship. The ammunition consists of smart bombs that can destroy every enemy on the screen, but it is limited in number hence the player needs to use it wisely. There is a map to help the player see where he aliens and human beings are located so that the player can prepare the plan of action for the attack.
Stargate appoints different scores for a different feat like rescuing a human is make you earn 250 points etc.
The key feature of the landscape is the Stargate itself. The Starship will carry four humanoids, and if the player enters the Stargate, you will warp ahead several levels.
Port for Stargate had been developed for The Atari 2000 and is not available for any other platforms.