Developer: Imagic

Imagic was founded in 1981 by former Atari and Mattel staff, among them the programmers Rob Fulop, Bob Smith and Dennis Koble. Its first three cartridges, Demon Attack, Star Voyager and Trick Shot, came out in 1982, and Demon Attack became one of the year’s best-selling console games. Imagic made Atari 2600 games until the market collapsed in 1983; one of its last, Laser Gates, was a finished game it bought from another small company.
The site has eighteen Imagic cartridges. Some good places to start:

Demon Attack (1982): Rob Fulop’s shooter with flapping, splitting demons, and Imagic’s biggest hit.
Atlantis (1982): Dennis Koble’s city defence with three fixed cannons, the company’s second biggest seller.
Cosmic Ark (1982): Fulop’s sequel to Atlantis, with a moving starfield made from a hardware bug.
Riddle of the Sphinx (1982): Bob Smith’s Egyptian adventure, built around a clever inventory system.
Dragonfire (1982): Smith’s two-screen treasure raid, which keeps getting faster.
Fathom (1983): Fulop’s adventure under the sea and in the sky, starring a hero who changes between a dolphin and a seagull.

The list also includes rarities such as Atlantis II, made for a high-score contest, and Wing War, the one Imagic cartridge released only in Europe. Choose a game below and play it in your browser.