Treasure of Atlantis is a Game that the User has loaded into Mainframe. The Game takes place completely under water. The User is a silver shark submarine, and has fifteen lives in the Game. To win he must find the Lost Treasure of Atlantis. There are several obsticals in the Game to keep the User from finding the treasure. Dozens of Game Sprites fill the Game and are programed to stop the User and some to stop the Mainframe players from getting to the treasure as well. The User must compete against other submarines and merfolk to find the treasure. The first one to the treasure wins, if the User loses all his lives before he reaches the treasure the Mainframer's win.