G.A.M.E.S. video game store, Van Nuys, CA, 1983 ad
This is an add for a mail-order video games company aptly named G.A.M.E.S. (though I’m not clear what that stands for) based in Van Nuys California. I’m not really familiar with them but this ad is from 1983 which was a few years before I started paying attention to magazines.
This particular ad has a variety of interesting things for the Atari 2600, Atari 400/800, Colecovision and Intellivision, the most interesting of which is probably the Starpath Supercharger. This was a device that allowed you to connect a standard audio cassette player to your Atari 2600 in order to load games specifically made for it. It also added 6k of memory which was a massive increase given the fact that the 2600 started with only 128 bytes (yes bytes, not kilobytes). Of course, data from a ROM cartridge could be swapped into RAM a lot faster than data from a cassette could.