Modulus is a modular roleplaying system. At its core, Modulus offers a very simple, easy to learn core mechanic that can then be expanded upon to create a richer gaming experience. Need rules for guns and gear? Add them. Magic and mental powers? Toss them in. A more elaborate character attribute and skills mechanic? Grab that too. Modulus empowers gamemasters to customize and personalize the mechanics of their game, playing up what is important for the theme and feel of their world, while playing down or outright ignoring everything else that would otherwise detract from it. Why settle for good enough when you can get exactly what you want?