A full sandbox game with build tools, weapons, NPCs, a spawn menu, dupes, saves and a full HUD. Players can spawn props and entities, use a toolgun to create constraints and effects, fight NPCs, and manage inventory and loadouts. It is built from many networked components and Razor UI panels, has systems for save/load, undo, limits, post processing and freecam, and integrates platform services for stats, achievements, workshop content and news.