Another solar powered flip game, released as many different games in different countries (Japan as Gekisen U-Boat, US as Sub Attack, Sub Patrol I believe is UK and other European countries, and just U-Boat in France.)
Gekisen U-Boat:
Sub Attack:
Sub Patrol:
There are 6 unique games in this series, sold under several different names depending on the country it was released in:
Breakout (or Daidassou)
Escape from the Devil's Doom (or Tengoku & Jingoku)
Invaders of the Mummy's Tomb (or Nazono Pyramid)
Nazono Chinbotsusen
Shark Island
Sub Attack (or Sub Patrol or Gekisen U-Boat)