In Ghen War , an evil force of aliens known as Ghen attacks the solar system, prompting a Lieutenant surface engineer in a hypersuit to defend Earth in twenty levels. From the cockpit of his suit, he operates various weapons and tools to take down the alien threat.
The gameplay involves navigating through planet surfaces and city environments, protecting human life while fighting against the Ghen aliens. The player also has access to a claw that can manipulate objects and send out decoys to confuse opponents. As players progress, they'll encounter increasingly difficult terrain, with explosions creating craters and environmental damage wearing away at the landscape.