Grade: B+ (88.39)
You pilot a sub on a rescue mission. Capture as many treasure divers as you can before you run out of oxygen and shoot the enemy subs and sharks. I guess the game wasn't hard enough like that, so they made the additional rules: 1) If you surface before capturing 6 divers, you lose a diver, and 2) If you surface with no divers you lose your sub. Reach a score of 50,000 and you're eligible for the Activision "Sub Club".
Images from www.atariage.com (used by permission)
Descriptions from www.atariguide.com (used by permission)