Abstract: Provided is a game system with gears and indicia, for modular game information record-keeping and record-changing devices, systems, and associated methods based on sets of mechanical gears having game indicia provided thereon. The architecture of the system uses combinations of mechanical gears, cams, shafts, clutches of various types, and other mechanical components that constitute an analog “computer” performing basic mathematical functions, managing data, or performing analogs for life principles—such as the impact of events, physics-based or fantasized realities, interpersonal relationships, behavioral characteristics, conflict dynamics, etc.