Imagic was the best third party company after Activision. Imagic was founded by former Atari employees and published games for the Atari, Intellivision, Odyssey 2 and Colecovision. Imagic survived the video game crash of 1983 but, it finally went out of business in 1986.
Imagic released 6 games for the Colecovision. They are very good games and relatively easy to find except for Tournament Tennis. The cases of these games are different from their competitors. They had a “handle” on the top of the cart with the Imagic logo embossed.