While the base game is paid, the community offers a massive amount of free content that can be added to your library:
Train Simulator 2019 (part of the long-running series by Dovetail Games) is not a permanently free-to-play game; however, there are legitimate ways to access the core software for free if you are an existing owner or interested in its modern successor, . 1. Free "Core" Updates for Owners Train Simulator 2019 Free Download
: A free, open-source project compatible with Microsoft Train Simulator (MSTS) content. While the base game is paid, the community
How to Download and Install Content in Train Simulator Classic While the base game is paid
: A free, community-driven simulator focused on subway and urban rail.