The old open source Transport Tycoon spin-off has made it to Steam. Looks like a quick and easy way to get this free old classic:
There are a few historical quirks to play TT, so check out the links/tutorials here:
http://steamcommunity.com/app/434520/discussions/0/364042703858421241/
Alternatively you get get the ‘original’ fork of TT here:
I loved simutrans for the time when I did play it, but I cannot really see why you would pick it over OpenTTD. Anyway, I might feel strongly about having my 3000 train company in OpenTTD.
The video a mate of mine did for it, we pretty much build it with the 3 of us:
We even build a museum:
We did more things:
A lot more:
Wow - that’s some seriously impressive TTD’ing… 
It was a strange time in my life. We’ve spend a long weekend drinking beer, making pasta, listening to weird music and playing OpenTTD in an apartment where we used a turned over bookcase as a table. T’was a great time though!