A free program for Android, by Gameology.

Train Simulator: Train Driver Taxi is an offline train game for free.

You will become a real train driver when you play this game. The gameplay is very easy to learn. All you need to do is to pick up and drop passengers. You will have to drive along a railway track. The track has different stations, and you need to pick up passengers from one station and drop them at the other station. The passengers are not heavy, so it is easy to pick them up and drop them.

You will need to pick up and drop passengers within a time limit. You will be given a mission. If you complete the mission, you will be given a new one. The gameplay is easy to learn and play.