Airlock is an action game developed by Data Age, in which the player must move through the Airlocks in a submarine.
Each stage is an airlock in which the player must avoid enemies while traveling up five floors to escape. Each floor has a switch which opens the path to an elevator, which takes the player to the next floor. Once the player reaches the next floor, the previous floor is sealed and fills with water.
The player must jump over enemies to avoid them, while flipping the switches and reaching the elevators.