The year is 2089. You are Aster, a lone, human backup system for a remote mining facility operated by the solar system’s largest and most powerful organization, commonly and unambiguously referred to as The Corporation. You are half-way through an eleven-month deployment to Hyperion, a small moon orbiting Saturn, when Orion, the AI system for which you are the backup, suddenly stops working.

What follows is a struggle for the survival of humanity, and of The Corporation. Through five increasingly frantic levels, you will fight to repel a persistent yet profitable alien invasion of Earth's solar system. In the end, you may or may not be the one to save Earth, but your decisions in the final level will inevitably have a lasting impact on the future of humanity.