System Shock

In this game you find yourself stuck on a space station with the insane computer Shodan. She have great plans for destroying earth and your goal is to stop her and flee from citadel station. I recommend playing the Enhanced Edition with mouselook, higher resolution and more quality of life features.

System Shock 2

Role-playing game that continue the story from System Shock. This time you wake up aboard the space ship Von Braun and find that everyone is dead and there are some problems with the computer system. Shodan is back and her goal includes earth gone and you dead :).

System Shock 2 - Ponterbee Station

This is a new fan made campaign for System Shock 2. Its huge like a whole game =).