A strange little side quest
The rules may be simple on screen, but the backstory around Shoot Belle is anything but tiny. Doom changed game design and distribution in 1993 by separating its engine from content and spreading widely through shareware. The broader history adds one more wrinkle. In 1958, Tennis for Two used an analog computer and an oscilloscope to turn simple physics into a playable tennis-like demonstration. That long chain of experiments is part of why action games still feels fresh when a game finds the right twist.
