A strange little side quest
One reason action games keeps producing good game ideas around Zombie Buster is that its history is full of strange turns. Gun Fight reached arcades in 1975 and became the first arcade video game to use a microprocessor. Another piece of context lands nicely beside it: Atari's Gran Trak 10 from 1974 is recognized as the first arcade racing video game. The details change, but the appeal of learning a system and trying again is remarkably persistent.