In the early days of personal computing, computer games were played on machines that were barely powerful enough to run them. Games were simple and pixelated, and players had to use command lines or arcane keyboard shortcuts to control them.

These days, computer games are huge and immersive, with stunning 3D graphics and realistic physics engines. But there’s a certain charm to the old school games of yore. They were challenging and often brutally difficult, but that added to the satisfaction of finally beating them.

Some of the most popular old school computer games include:

Pac-Man: This classic arcade game …