On May 22, 1968, the American submarine USS Scorpion (SSN-589) mysteriously disappeared in the Atlantic Ocean. Your mission is to find the Scorpion before the Americans do and recover its precious cargo: an early prototype MK4 nuclear torpedo. The depths are dangerous, and the submarine's exact location is unknown. Use your ingenuity and cunning to sneak among the sharks and explore the ocean floor before the oxygen runs out.