Underwater Treasures: Cogwheels and Submarines is a simulation game developed by Airapport for the Android platform. In this game, you are an underwater engineer who builds a mechanical empire on the sea bed. You explore the idle ocean and construct incredible contraptions with cogs in the depth. The game starts with a small research station at the bottom of the ocean where you work for survival in the idle ocean. As you progress, you expand down, up, left, and right.

The game offers various mad science contraptions that can be connected in multiple fun ways. You can construct factory machines that make this game stand out among standard idle clicker tycoon games. The tutorial gives you the basic concepts, but to ultimately succeed, you must be a real researcher and uncover hidden gameplay mechanics. The engines will work while you are away, producing idle cash. Additionally, there is a big community in Discord where you can share your creations with 9500 group members. The game contains only rewarded ads, which are launched by the player to increase earnings. It also works in offline mode without an internet connection. You can receive your daily reward by catching a submarine.