The Hunt for Red October

The Hunt Goes On! You are Captain Marko Ramius, commander of the most advanced nuclear submarine ever created - the Red October. In a desperate attempt to defect to the United States, you must evade detection from an onslaught of enemy forces, both underwater and on the surface. Danger comes at you from all sides - even from within. It's destroy or be destroyed! Each mission is an incredible challenge to your skill, reflexes and command abilities. (mobygames.com)