Has anyone tried SimRail yet? I watched a video from Squirrel the other day about it. It's a Polish game that is aiming to create highly detailed renditions of Polish train routes. So far, there is about 500 kilometers of track, supposedly accurately rendering the real world. It looked pretty good but it's early access so I don't know if it's worth buying yet.
https://www.youtube.com/watch?v=DSgakkdk93c