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In the Trainz franchise, a "Build Number" indicates the exact patch level and platform version of the game. Build 46957 represents a specific point in the development cycle of Trainz Simulator 12, typically associated with the initial retail disc releases, early digital distributions, or specific regional editions. Why the Build Number Matters
If you bought Trainz Simulator 12 on Steam, Steam handles the DRM automatically. You generally do not need to manually enter a CD key for the Steam version, as the client manages the installation registry parameters. If a community route asks for it, you can usually right-click TS12 in your Steam Library, select , and look for Product Keys . How to Register and Activate Your Key