In the early 1980s, Mattel's Intellivision video game console was a direct competitor to Atari's Video Computer System (VCS), better known as the Atari 2600. Although Mattel designed and produced video game cartridges for their own system, they also designed simplified versions of many of their games for the 2600 under the M Network label.
M Network produced home ports of popular arcade games, including BurgerTime, Bump 'n' Jump and Lock 'n' Chase (all 1982) as well as original titles such as Tron: Deadly Discs (1982 – based on the Disney movie) and Kool-Aid Man (1983), one of the earliest "promogames", originally available only via mail order by sending in UPC symbols from Kool-Aid containers.
Mattel programmers (christened by TV Guide as the "Blue Sky Rangers") were also encouraged to develop video game tie-ins with other Mattel properties; games such as Masters of the Universe: He Man (1982), leveraging Mattel's Masters of the Universe media franchise, were released.
M Network cartridges made for the 2600 were physically similar to Intellivision cartridges, but with a base designed to fit the 2600's larger cartridge slot.
Although Mattel, through M Network, released cartridges for Atari consoles, they balked at allowing Atari to release cartridges for the Intellivision: in the early 1980s the company filed a lawsuit against Atari alleging that Atari had stolen Mattel's trade secrets when it hired former Mattel employees to develop a line of Intellivision-compatible cartridges.
- Yarusso, Al. "AtariAge - Companies - M Network". AtariAge. Retrieved January 5, 2012.
- Sullivan, George (September 1, 1983). Screen Play: The Story of Video Games. Warne. p. 75. ISBN 978-0-7232-6251-0. "It was almost as if NBC had started producing television shows for presentation on CBS."
- Bogost, Ian (August 5, 2011). How to Do Things with Videogames (Electronic Mediations). University of Minnesota Press. pp. 67–8. ISBN 978-0-8166-7647-7.
- Bogost, Ian; Montfort, Nick (2009). Racing the Beam: The Atari Video Computer System. MIT Press. p. 124. ISBN 0-262-01257-X.
- Polskin, Howard (June 19, 1982). "Behind the scenes with the Blue Sky Rangers who dream up Mattel's video games". TV Guide. Retrieved January 5, 2012.
- Herman, Leonard (1997). Phoenix: The Fall & Rise of Videogames. Rolenta Press. p. 96. ISBN 0-9643848-2-5.