Trail of Nyarlathotep
One of my very first ideas was that it would be entertaining to have an achievement system for a tabletop game: a way for the GM to reward players with a little mechanical boost for accomplishing interesting, unlikely, or badass feats during the course of play.
To that end, there is an achievement system in place. You can “cash them in” for a one-time refresh of a couple points to a pool of your choice.
I’ve bashed together a small app to track them digitally, which you can see here: Achievements