Odyssey series in the context of "ROM cartridge"

In the history of video games, the first generation era refers to the video games, video game consoles, and handheld video game consoles available from 1972 to 1983. Notable consoles of the first generation include the Odyssey series (excluding the Magnavox Odyssey 2), the Atari Home Pong, the Coleco Telstar series and the Color TV-Game series. The generation ended with the Computer TV-Game in 1980 and its following discontinuation in 1983, but many manufacturers had left the market prior due to the market decline in the year of 1978 and the start of the second generation of video game consoles.

Most of the games developed during this generation were hard-wired into the consoles and unlike later generations, most were not contained on removable media that the user could switch between. Consoles often came with accessories and cartridges that could alter the way the game played to enhance the gameplay experience as graphical capabilities consisted of simple geometry such as dots, lines or blocks that would occupy only a single screen. First generation consoles were not capable of displaying more than two colours until later in the generation, and audio capabilities were limited with some consoles having no sound at all.