While lacking the romantic appeal of a steam locomotive, Pax Reactor [1] is basically a 1375 MW boiler. Pretty fun until everything hits the fan.

[1] http://henrik.zsolt-frei.net/Fun/Software/pax.html

Thanks for that, it's an awesome sim.

Yep - https://www.youtube.com/watch?v=2Awv8xjqMjQ

Train Simulator is, in practice, mostly about micromanaging your steam levels.

Surprisingly, Steam is also mostly about micromanaging your Train Simulator levels.