Since the dawn of computers, games have been an entertaining way to demonstrate a system's capabilities. Manufacturers like DEC distributed them as early as the 1960s: They were as powerful sales tools with universal appeal. The tradition continued with some of the earliest PCs. Simple (but often addictive) games are bundled with operating systems to this day.
Here's a look at notable games that have shipped with OSes through the ages-including ones written by a few of the most famous programmers of all time.