Compatible emulators

Synopsis

The player has arrived at Vulcan Rock, an artificial planetoid defended by a laser-eyed space serpent and other minions of the Extra-Terrestrial Alliance. Now he must defend himself against them, as well as the volcano itself.

Controlling his spaceship with the control stick and shooting laser shots with the action button, the player must avoid falling lava, rocks, laser beams from the snake. Shooting the snake will stun it, and shooting the rocks will destroy them. If the ship exits the screen from one side, it will return to the opposite side.

Occasionally, Gryptogg, Raygoth, and Arkus of the Alien Alliance will open doors in the volcano by firing a gravitational ray that drags the player's ship. The higher the score, the stronger the beam will be. It can be stopped by blasting the door with the laser.

The player gains 3 points for blasting lava during the volcanic eruption, 15 points for stunning the space snake, 45 points for hitting an open door, 75 points for destroying a lava rock, and 1000 points for surviving a volcanic eruption.

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