A strange little side quest
There is a neat bit of history hiding behind the kind of play you find in Zombie Shooter: Destroy All Zombies. Gun Fight reached arcades in 1975 and became the first arcade video game to use a microprocessor. That old idea kept changing rather than disappearing. 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.