Orbiters Local 519 is a complete sci-fi TTRPG about disassembling derelict starships, built for open tables and one-shots. It focuses on dungeoncrawling, with one important difference: instability. As the players move through the derelicts, seeking valuable components, the ship falls apart. Pipes explode, walls collapse, and entire rooms may separate from the core. Along with this natural damage, the players are given the tools needed to demolish their environment: welding torches, plasma cutters, and explosives. It includes: Streamlined exploration mechanics built around an Event Die, which handles creature movement, derelict collapse, and oxygen depletion. Robust derelict ship generation that determines the ship's type, the disaster that claimed it, and a room-by-room map creator. Class-based character advancement and management.