Mechanisms Ror Tabletop Roleplaying is a collection of well-polished and interesting house rule suggestions for any pen-and-paper roleplaying system, with further suggestions for tailoring the new mechanics to a preferred system. Though the rules herein do seem to be informed by a number of other games ("Action Scenery" especially, being very similar to Apocalypse World's task resolution), their execution is sufficiently unique and easy enough to follow to more than justify a purchase. Aside from the solid content, the presentation is far above and beyond what is par for the course for inexpensive, minimalist supplements sold exclusively through digital distribution. I've been very disappointed by similar products in the past, such is not the case with Mechanisms For Tabletop Roleplaying. I highly recommend it.