You can purchase the modern version, Train Simulator Classic , which includes updated graphics and routes.
1024 MB DirectX 9.0c compatible (GeForce GTX 560 Ti or better) Railworks 3 Train Simulator 2012 Free Download
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 You can purchase the modern version, Train Simulator
For those using older hardware or original discs, these were the recommended specs: Windows 7 / Vista / XP Processor: 3.0 GHz Quad Core or equivalent Memory: 4 GB RAM Ways to Access the Game Today For those
You can still find DVD-ROM copies of the original RailWorks 3 on secondary markets like eBay.