From publisher blurb: Sometimes you just have to roll with it Rolling the bones further augments the existing dice rolling convention and expansion of Big Damn Sci-Fi. It adds complexity and variety to the game by offering new ways to replicate non-combat situations, character creation and exerting limited player narrative control. This Core Companion includes the following features: Action difficulty to create greater challenged Complex Actions for those long multistage tasks Group Actions for collaborative efforts Trait determination options for character creation Plot point system to provide limited narrative control to players New Combat Options