Fortnite hit 125 million players worldwide just one year after it was first released, with an estimated 40 million playing across the globe every month.
Its unrivalled popularity has been partly fuelled by its availability for free on smartphones as well as on traditional home video game consoles, making it popular with teenage gamers.
But with its rise to prominence health experts have warned of the dangers of online gaming addiction, particularly among children.
The NHS has even offered to treat young gaming addicts for free, after it was recognised as a mental disorder.
Last week a four-year-old boy from Oxfordshire broke his arm after trying to imitate a stunt he had seen players do inside the game.
Harrison Day missed his first day of primary school after jumping off a slide in his back garden while holding an umbrella - because he wanted to fly "like they do in Fortnite".
Earlier this month a disabled mother was left penniless after her 10-year-old son stole her bank details to spend NZ$2400 on the game.
Cleo Duckett, of Bridgend in South Wales, was devastated when she found out what her son Jayden-Lee had done.
What is Fortnite?
Fortnite is a game of survival where players create a superhero avatar and compete against each other on a dystopian island.
Each game, or 'match' as each competition is known, starts with 100 players.
The aim of the game is to be the last one standing. Users can form allegiances and play in small groups.
To enable this and the interactive experience, the game allows completely open communication between players.
Inspired by the Hunger Games novels and films, gamers search for weapons to help them survive.
Armed with quirky weapons and amusing dances, the game has swept across the gaming world, with children flocking to it.
While there is no exact figure on how many children play Fortnite, the game has so far pulled in an audience of over 125 million players.