The GUTS+ System is a role-playing game system in the spirit of Dungeons & Dragons and Pathfinder, but simplified to focus more on collaborative storytelling and free-form play.
Rather than having set skills, GUTS+ focuses on individual stats giving your character the ability to do things, and if they don't have a specific stat, their success at performing tasks is dependent upon their base stats: Gumption, Utility, Thought, and Slyness.