Check your Steam Library for "Train Simulator Classic." Any previous purchase of RailWorks 3: Train Simulator 2012 grants you access to the current core engine.
While the base game is paid, there are extensive freeware packs for locomotives, routes, and scenarios available through community sites like UKTrainSim. Original Minimum System Requirements (2012 Version)
While is no longer available as a standalone "free download," it has evolved into the current Train Simulator Classic . If you previously owned RailWorks 3 or any earlier version on Steam, your game has likely been automatically updated to the latest version of Train Simulator Classic for free. Ways to Access the Game Today
1024 MB DirectX 9.0c compatible (GeForce GTX 560 Ti or better)