The Price is Right Core Mechanic

I started to like 1d20 roll under for a couple of reasons. It keeps the maths simple, with 5% increments that feel meaningful but aren't as fiddly as d%. By using an over/under system; rolling under your stat but over a difficulty rating of 5 or 10 (with exact numbers being a crit success) we end up with a core mechanic that is pretty direct and you can pack most of the stuff players need to make…