Description: Earth's nuclear holocaust is over and after several years the air is finally breathable again. The Shelter Network has unlocked the airlock for one hour. If the airlock is not utilized in that hour the Network will assume everyone is dead and seal the shelter forever. It is up to you follow the clues and unravel the puzzles the caretaker created to ensure his safety. In the end, it led to his demise... will it lead to yours?