Publisher: M Network

M Network was the label Mattel Electronics used for its Atari 2600 cartridges, starting in 1982. Mattel made the Intellivision console, and most M Network games are 2600 versions of Intellivision titles, often with new names. Astrosmash became Astroblast, Night Stalker became Dark Cavern, Frog Bog became Frogs and Flies and Armor Battle became Armor Ambush. Many of the conversions were done by APh Technological Consulting. The label also carried arcade licences such as Data East’s Lock ‘n’ Chase and Bump ‘n’ Jump, two Tron games based on the Disney film and the first He-Man video game.
The site has 19 M Network games. Two of them, Swordfight and Sea Battle, were finished but shelved and only came out in 2000. Some to start with:

Astroblast (1982): shoot rocks, bombs and missiles falling from the sky.
Lock ‘n’ Chase (1982): a cops-and-robbers maze where you slam doors behind you.
Tron: Deadly Discs (1983): an arena fight against disc-throwing warriors.
Masters of the Universe: The Power of He-Man (1983): fly to Castle Grayskull, then face Skeletor.
Air Raiders (1982): first-person jet combat, including take-off and landing.
Swordfight: a two-player duel with large laser-sword knights, released in 2000.

Pick a game below and play it in your browser.