Play as Admiral Gaslight in an undersea battle against fifty waves of enemies. Earn extra ships by killing enemies, but be careful because your extra ships can be destroyed by friendly fire. As you play, the enemies get tougher and tougher making it almost impossible to avoid damaging your reinforcements. Play perfectly and earn score multipliers to really rack up the points.
Use the left and right arrow keys to move. Space to fire. Earn an extra ship every 5,000 points. If you earn an extra ship while you have three on the screen, the score multiplier increases. Destroy your own ship or get killed and the score multiplier is reset to one.