Crux: Universal Roleplaying

CRUX is our in-house tabletop roleplaying system. Designed for modular use in any genre, every CRUX game is cross-compatible any other, so you can play in worlds you like or mix and match parts to create your own.

CRUX uses a single set of common polyhedral dice (d4, d6, d8, d10, d12, and d20). Gameplay revolves around rolling a "CRUX die" (starting at a d4, but "leveling" to higher dice as the character becomes more experienced) and adding a modifier based on their abilities. We built our system with a mind toward real-world plausibility, with fantastic elements (magic, monsters, weird science) skewing those values into the realms of the outrageous, all while being simple enough to fit into a 36 page rulebook.

This book doesn't come with a pre-baked setting, but is a launchpad for your own ideas, and includes elements from a smattering of genres to give you a point of reference when creating your own content.