The Atari 2600 arrived in 1977 as the Video Computer System and made cartridge-based gaming a normal part of family life. Its hardware was tiny, with only 128 bytes of memory, so programmers had to be inventive, building whole games out of a few blocks, a handful of colours and carefully timed code. The results were simple but surprisingly varied: space combat, maze chases, sports, early adventure games and a large number of home versions of arcade hits. The library also includes regional releases, unreleased prototypes and homebrew experiments, which makes browsing it feel a bit like going through a museum archive. These games are short, blunt and often harder than they look, with a single-button joystick doing all the work. No console or cartridge is needed: the games can be played on GamesClips, giving you a taste of the machine that launched the home console market.