Airlock is a platform game for the Atari 2600 published by Data Age in 1982.
The player runs and jumps through the interior of a crippled submarine with only ten seconds to complete each level
Each floor has two hatch keys that need to be collected in order to unlock the elevator to the next level. There is a time limit, though; if you take too long the floor will flood and you'll be unable to escape.</p><p class="top20 bot20"> Due to the crash, the torpedoes on board the submarine are now loose and wander across the floor as the boat shakes. The player will need to jump over any torpedoes that cross their path, or they will be stunned momentarily and lose precious time.