How Wild Crazy 8s' rule engine grew from 30 polite modifiers to more than 150 that multiply each other, and the balance math that keeps it winnable anyway.
The single design decision that made Wild Crazy 8s honest, and why authentic Crazy Eights beats a stacked deck.
I built a twelve-dimension rubric, graded thirteen of my own prototypes with it, and shipped the ones that survived. Most did not.