Hidden Mysteries: Return to Titanic has no connections with Monument builders: Titanic, Time Management game where your task was to build the Titanic in short terms, or with Titanic 3D film by James Cameron. It's absolutely different game with it's own story.
You can download it for Windows: Hidden Mysteries: Return to Titanic
So what this game about? Your playing character is hero named Charles and he is a pro-diver. With the team of explorers he went to the place where Titanic lay in it's water grave, looking for interesting evidences and souvenirs of the past. But when he entered the luxury ship, once the most beautiful and prosperous vessel in the world, something happens. Some supernatural force trapped Charles and throwing him through time, sowing the present destruction of the Titanic and it's former prosperity and beauty. You will explore decks and locations of the Titanic just before the iceberg strike and after it, when the ship started to sink. If you want to know more about Titanic structure, read Facebook page, dedicated to the game.
To see how the game is looking, watch gameplay video of Hidden Mysteries: Return to Titanic. If your Internet connection is slow, you can watch the screenshots below instead.