A strange little side quest
Between one round of Advanced Pixel Apocalypse and the next, this is worth knowing: Doom changed game design and distribution in 1993 by separating its engine from content and spreading widely through shareware. It also connects to a different milestone: Space Invaders, released in 1978, helped push video games into mainstream popular culture. The details change, but the appeal of learning a system and trying again is remarkably persistent.