If you are looking for a completely free experience without purchasing a base game, consider these open-source or freeware alternatives:
: A free, open-source project compatible with Microsoft Train Simulator (MSTS) content. Train Simulator 2019 Free Download
How to Download and Install Content in Train Simulator Classic If you are looking for a completely free
: New routes and locomotives (like the Portsmouth Direct Line or Frankfurt High Speed) are typically sold as part of the year's "Edition" bundle or as individual DLC. 2. Transition to Train Simulator Classic Train Simulator 2019 Free Download