Stories you make and play in ARC run against a timer. While heroes navigate and transform the world around them, the real-time Doomsday Clock ticks to an irreversibly cataclysmic event. Manage your hours. The Doomsday Clock allows you to dictate literally how much time you need for your story. Skill Checks allow for players' ingenuity. Heroes are naturally adept at their skills, but players articulate how these are applied. Insightful solutions can ease the Threshold Number. Pick-up-play with raised stakes. The tight rules, including unique initiative and story consequences for "death", fit on the back of the character sheet! The unique blend of real-time and in-story mechanics means, however, that games always have a sense of mission and purpose.