A free app for Android, by FIBRUM.

Gravity Train VR is a virtual reality game that combines a real-time simulator and a 3D environment to create an immersive experience.

As your ride the train, you will be able to travel through different cities and countries. Each place will be rendered in 3D, allowing you to explore and interact with the world in a more immersive way.

The simulator will be based on real-life physics, so you will have to consider the gravity and other forces when you are jumping from one city to another.