A strange little side quest
One reason action games keeps producing good game ideas around Grunge is that its history is full of strange turns. Doom changed game design and distribution in 1993 by separating its engine from content and spreading widely through shareware. And then there is this: Boxing was part of the ancient Olympic Games by 688 BC, long before gloves, weight classes, or timed rounds existed in anything like their modern form. So a round of Grunge is not just a quick distraction; it is a tiny stop on a much longer action games timeline.