Escape the U.S.S.R. and defect to the U.S.A.
Cripple the Arms Dealers in the Caribbean.
Escort the passenger ship to safety.
Destroy the Nuclear Facility in the North Pacific.
Defend the oil rigs in the North Pacific.
Destroy the illegal biochemical research lab in the North Pacific.
"Liberate" the stolen naval vessel from the mercenaries.
Remove the enemy guns on the shores of the Mediterranean.
Provide support to the coup attempt in the U.S.S.R. by disabling the aircraft carrier
Get a total of 15 hits in the bonus game in Mission: Illegal Arms Merchants
Get a total of 15 hits in the bonus game in Mission: Escort Ocean Liner
Get a total of 20 hits in the bonus game in Mission: Terrorists Weapons Plant
Get a total of 20 hits in the bonus game in Mission: Neutralize Enemy Destroyer
Get a total of 25 hits in the bonus game in Mission: Onshore Gun Batteries
Use only the Surface-to-Air Missiles during a level other than the first.
Get to the end of a level other than the first or final level with no damage to the sub
Get through the entire game without having more than 50% damage at any time