Gravity Train Dispatch is a local physics logistics puzzle about moving cargo trains through impossible floating rail loops. Players choose trains from a queue, tune gravity fields, switch tracks, inspect route nodes, and dispatch only when the collision predictor looks safe. Risky choices trigger route conflicts and reduce efficiency, while clean deliveries unlock 18 route plans and improve the depot record. Replay analysis explains recent failures, and depot ability cards help stabilize later routes. The game focuses on timing, prediction and spatial routing rather than buying tickets or managing a shop.