Demon Attack is a video game published by Imagic for the Atari, Intellivision, Odyssey 2 and the Commodore VIC-20 home consoles. Demon Attack was programmed by Rob Fulop.
Marooned on the ice planet Krybor, the player uses a laser cannon to destroy legions of demons that attack from above. Visually, the demons appear in waves similar to other space-themed shooters, but individually combine from the sides of the screen to the area above the player's cannon.
Each wave introduces new weapons with which the demons attack, such as long streaming lasers and laser clusters. Starting in Wave 5, demons also divide into two smaller, bird-like creatures that eventually attempt descent onto the player's cannon. Starting in Wave 9, the demons' shots follow directly beneath the monsters, making it difficult for the player to slip underneath to get in a direct shot.
Demon Attack closely resembles the earlier arcade game Phoenix, prompting a lawsuit from Atari, who had purchased the latter's home video game rights. Imagic settled out of court, and Demon Attack went on to become the company's only hit title.
This particular Atari cartridge works ONLY on the 400/800 models of the Atari.