You are captain of a submarine on a secret mission behind enemy lines.

Your mission is to:
- Sink all battleships
- Don't sink friendly ships
- Avoid enemy torpedoes

Features:
- 5 types of weapons: Torpedo, Auto guiding torpedo, Auto guiding rocket, Electro-magnetic impulse, Nuclear rocket
- 3 types of enemy boats and additional friendly boat
- 3 different time settings: Night, Dawn, Day
- Upgrade armor shield of your submarine and upgrade speed of your torpedoes

Defeat your enemies and win the war!