If you ever registered the game, log in at SimulatorCentral.com or the N3V Games portal. Your serial number will be listed under "My Registrations."
Purchasing on Steam automatically handles the CD key and activation. trainz simulator 12 build 46957 cd key
Buying directly from N3V Games ensures the key is linked to your account for life. If you ever registered the game, log in at SimulatorCentral
Search your inbox for "N3V Games," "Simulator Central," or "Auran." Avoiding Key Generators and "Cracks" If you ever registered the game