: To access multiplayer (MP) and community support, you must register your legitimate copy on the Trainz - Auran official website. Where to Buy

: Join players from around the world in operating a shared railroad. Satellite View

: You can often find used or "New Old Stock" physical DVD copies on eBay. Just ensure the seller confirms the serial key hasn't been registered, or you won't be able to use the online features. Common Troubleshooting for Valid Keys If you already have a legitimate key and it isn't working:

For a guaranteed working experience, it is recommended to use official channels or reputable third-party sellers.