If you have a version that specifically asks for a serial number, you can find it using these methods:
Most Steam versions do not come with a separate serial number. Authorization happens automatically when you link your Steam account to your MyTrainz account through the game's settings. Activation Steps Serial Number For Trainz Simulator Hd
For , which is primarily a mobile version of the game, a dedicated serial number is typically not required . Modern versions of Trainz, including mobile and digital store editions, use your MyTrainz account login and password to verify ownership and authorize the game. How to Find or Register Your Serial Number If you have a version that specifically asks
Look for the serial number on the back of the CD/DVD case, on a sticker inside the case, or on the front page of the printed manual. Modern versions of Trainz, including mobile and digital
Review the email sent to you after your purchase; serial numbers (e.g., starting with "ATS9" for older versions like TS2009) are often included there.