You can run an in-browser emulation of Berzerk, a multi-directional shooter video arcade game released in 1980 by Stern Electronics of Chicago but avoid at all costs Evil Otto. Alternatively, you might want to play Pitfall! That game was released by Activision in 1982. At the time, it is the second best-selling game made for the Atari 2600 (after Pac-Man), with over 4 million copies sold.
Both and many more early PC-Apple games as well as some early productivity programs such as WordStar, the most popular word-processing program of the early 1980s and the grand-daddy of mark-up coding, plus a 1979 version of VisiCalc, the first-ever spreadsheet program, are available as in-browser emulations from the Internet Archive’s new Historical Software Collection.
Hat tip to Bob Ambrogi’s Retro Fun: Try Out Historical Software (LawSites post). — Joe