Alien ships (Gorgon's fleet) are shooting down the underwater country of Atlantis! It seems that the ancient civilization is about to disappear completely. We need to protect the underwater world and as soon as possible!
You have a total of three gun turrets at your disposal - two on the sides and one in the middle. And the city is covered by a powerful shield (which can collapse if you don't defend well). If, nevertheless, it was not possible to save one city, depending on the points scored, you have a chance to restore it.
So-so game, although for that time the graphics and effects were good (I would say excellent), but the sound is standard ..
There was also a game on Atari 2600 (that's where the port for Intellivision comes from), Atari 8-bit, Odyssey 2, Commodore VIC-20.