A free program for Android, by FIBRUM.

The free game app for virtual reality devices, Fibrum VR, is the best way to enjoy the awesome 3D world with all the best game mechanics. Explore the desert subway tunnels full of bloodthirsty zombies and shoot ’em all. Don’t forget to check the other rooms for more weapons and items.

Fibrum VR is a great app for every Android device. All you need is a smartphone with a gyroscope.

How does Fibrum VR work?

When you start the app, it asks you to select a weapon from the available ones. After you select the weapon, you need to look at the door. If you see the door open, you can start shooting.