As agent Chatt Rhuller, you are ordered to the planetoid Rheom 1 to investigate the death of a scientist at the SATIN facility there. Dr. Dor Geopp apparently went crazy, tried to smash computers needed for the project and then tried to attack the head of the project, Dr. Victoria Fayn. She was forced to shoot him in self-defense.

This is not the first time something strange has happened at the facility. A year ago, it was rumored that one of the scientists went crazy and had to be taken away. As a result, the head of the Interstellar Transportation Commission (ITC) wants to know what could be causing the problems on Rheom 1. Could it be something in the air? Or is it the cold and lonely nature of the planetoid? No one is really sure but they want you to find out.

You are only supposed to spend a single day and night on Rheom 1 but your shuttle is sent away and the secrecy of Dr. Fayn and her colleagues makes you wonder about the nature of their work. And, what is going on in that lab to which you are denied access? It's obvious someone is not telling the truth.

Can you find out what is going on behind closed doors? Why are those people on the project hearing voices in their heads? Are they going insane? And what does this have to do with the disappearance and crash of the space liner Majestic so many years ago? Only you can find out in Zero Critical, a third-person point-and-click adventure. The game was originally released in a previous form under the name "Satin Rift." ~ Lisa Karen Savignano, All Game Guide