A strange little side quest
Here is a rabbit hole for the next loading screen in Mass Mayhem: Doom changed game design and distribution in 1993 by separating its engine from content and spreading widely through shareware. A second detail makes the picture even better: Spacewar! appeared on MIT's PDP-1 in 1962 and became one of the earliest influential computer games shared among programmers. That gives Mass Mayhem a little more company than it first appears to have.