At first, we had very big ideas surrounding the different parts of the game. We wanted the player to start out in a submarine, the submarine would be attacked by a monster and the crew would be forced to escape in pods. We contemplated having an underwater segment where the player was attacked by huge tentacles while escaping the submarine.
Once the main character had escaped, she would be presented with an ancient underwater temple, which looked like Atlantis, and this area would serve as a hub world for the game. Using that hub world, the player would be able to locate the missing crew members of the ship, whom were all scattered across an island on top of the underwater temple. Once the player had found all of the crew members, the game would end and the main character would become the new captain of the crew.