Derail Valley. If you like doing more that just driving a train from point A to B, this is the one. You have a career and you take on all sorts of jobs to earn money for licenses and gadgets for your train.
There’s shunting, long hauls, logistical hauls, loading/unloading consists, and several different locomotives you can earn licenses to operate. There are lots of cities, towns and industries that you travel to. Later you can unlock the museum license where you can tow old wrecked locomotives that you find lying in the weeds throughout the valley. You can then restore them, and at that point you own them.
This is one of those games where they really got the physics right and there are no annoying aspects to the interface. The locos and trains have a very heavy, physical feel to them. The sound is immersive.
This game doesn’t hold your hand. You’ve got to figure out how to logically navigate around various train yards by throwing the correct track switches. It’s a great way to get lost for several hours at a time.