A strange little side quest
Guns Don't Need People may feel immediate, but the ideas around action games have been evolving for a very long time. Doom changed game design and distribution in 1993 by separating its engine from content and spreading widely through shareware. That old idea kept changing rather than disappearing. Spacewar! appeared on MIT's PDP-1 in 1962 and became one of the earliest influential computer games shared among programmers. It is a good reminder that simple game mechanics can carry a surprising amount of history.
