Then:

Following World War II the United States government implemented a top secret program placing military personnel into a high-pressure situation inside a training submarine. This test was designed to assess their ability to make quick decisions and to determine how well they cope when facing a demanding situation. But due to an "unfortunate incident," the entire operation was shut down and the submarine was covertly dumped to the bottom of the ocean. 

Now:

You and your team of treasure seekers, while searching a desolate coastline, unexpectedly come across this submarine which has mysteriously resurfaced. Hoping to discover the find of a lifetime, you climb inside. But once aboard, the entry hatch slams shut, machinery begins to whir, and a feminine voice speaks through the darkness. "Is that you, Captain Penrose?  Welcome back. Training sequence initiated."

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