The game takes place in 2142. The protagonist is Conrad B. Hart, an employee of the Galactic Bureau of Investigation, who accidentally uncovers a conspiracy of aliens masquerading as humans. He is kidnapped and his memory is erased, but then Hart manages to escape.
The protagonist's adventures begin in the wild jungles of Titan, where he comes to his senses after a glider crash. Soon he finds a holocube (holographic video recording device) with a message from himself recommending that he go to New Washington, a city on the same planet, to a friend who will help in further investigation. After wandering through the jungle, Hart finally gets to New Washington. A friend named Ian helps him recover a memory specially recorded in case of a kidnapping. To continue the investigation, Hart needs to get to Earth, but the ticket is very expensive. He gets a job and gradually accumulates the amount needed to buy false documents. These documents allow him to take part in the deadly television show "Tower of Death" and, having won, receive the coveted ticket as a prize.
On Earth, Hart manages to discover an underground alien base. There he learns that the arrival of large military forces of an extraterrestrial civilization is expected soon, the purpose of which is the destruction of mankind. Then he is captured again, but this time he escapes, after which he teleports to the aliens' home planet. Hart destroys the brain that controls the actions of the aliens, and then the entire planet. After being rescued on a spaceship, Conrad finds out that he is in an unknown galaxy and cannot return home. The game ends with Hart falling asleep in a suspended animation chamber, hoping that someday he will be found.
In combat, Hart uses a pistol with infinite ammo, a temporary force shield, as well as rolls and sneaks. Acrobatics in the game is similar to Prince of Persia - Konrad can jump from a place and from a running start, hang on his hands and climb ledges, and also somersault. Rotoscoping technology makes the animation very realistic.
A feature of the game is a significant quest element, including conversations with many characters and solving various issues, obtaining the necessary items and using them (the episode in New Washington is especially rich in such elements).
The plot of the game has much in common with famous science fiction films, such as "Total Recall" (memory loss and a message to oneself), "Strangers Among Us" (a hidden invasion of aliens that can be distinguished from people only with the help of special glasses), "Running Man "(deadly TV show), "Blade Runner" (hunting for a cyborg in New Washington), "Alien" (alien lair, open ending of the game).