The player in the game Airlock is trapped in a destroyed nuclear submarine, which began to take on water. They must run, making their way up the floors of the submarine at the same time. Each floor has two hatch keys that must be collected in order to open the elevator to the next level (floor). There is a time limit though; if you run and think for too long, the floor will flood with approaching water and you will not be able to escape from such an unfortunate fate. Due to the accident, the torpedoes aboard the submarine are now loose and roam the floor when the boat is rocking. The player will have to jump over any torpedoes encountered on the way to rescue, if in any way your paths with a torpedo intersect, then you will be briefly stunned and waste precious time that you have been given to rescue from a submarine.