Through bleary, red eyes, the captain scans the surface through the periscope. 'She's a British tanker, 18,000 tons. Target Blue 60, speed 161/2 knots, range 5,000 meters, torpedo speed 30 knots, running depth 7 meters. Fire when ready.' SUBMARINE is a tense duel of nerve and wits recreating tactical submarine warfare in World War 11, Basically one on one, the players assume the roles of submarine commanders and destroyer captains, though more than one of each type vessel may be in the game. Most scenarios will involve attacks on convoys or perhaps an aircraft carrier. Basic and advanced games allow players to add only the amount of complexity, and realism, they desire. Game features include hidden submarine movement, surface battles, collisions, sonar, radar, star shells, silent running, hidden torpedo movement, weather, crew quality, damage repair, cargo types, and submarine versus submarine actions. Game includes German, Italian, French, American, British, Russian, Japanese, and Neutral ships. Submarines have a variety of torpedo types with different speeds and explosive power, and destroyers have varied weaponry including hedgehogs, squids, k-gun launchers, and the standard stern rack depth charges. A log pad is used to pre-record all movement for both sides. When there is more than one player on a side, communications will be limited or non-existent as each member of the wolf pack or escort squadron operates his vessel independently. A design-your-own section of the rulebook as well as a campaign game makes the game's scope unlimited.