The augmented reality game known as Ingress is taking the world by storm, with players from almost every nation on earth battling for control of towns and cities, day and night. But what is it exactly, why is it so popular, and why did around two thousand players descend into Slovakia's capital city on Saturday? Our reporter Gavin Shoebridge finds out.

Ingress XM Anomaly in Bratislava

Máte problém s prehrávaním? Nahláste nám chybu v prehrávači.

Gavin Shoebridge, Photo: Gavin Shoebridge