Since Fortnite was released last July, over 150 million people worldwide have launched it.
A nine-year-old girl (stock image) is in rehab after becoming so addicted to the Fortnite video game she wet herself to avoid moving and hit her father when he tried to stop her playing.
She is in intensive therapy "after becoming withdrawn, agitated and disturbed". Worn out from all-night sessions, she dozed off at school. At this revelation, the parents became angry and moved to confiscate the console.
In a bid to wean her off Fortnite, the couple limited their daughter's game play to one hour on weekdays and two hours on weekends, but she refused to follow the rules. "We got called in by her head teacher asking if everything was OK".
According to the WHO's International Classification of Diseases, gaming disorder is "characterized by impaired control over gaming, increasing priority given to gaming over other activities to the extent that gaming takes precedence over other interests and daily activities, and continuation or escalation of gaming despite the occurrence of negative consequences".
Despite the game being free on the online store, regular payments of $67 (Rs 4512) were made using their credit card, which the girl said was for in-game purchases.
When they asked their daughter what was wrong, she turned "unusually argumentative and aggressive".
She tearfully confessed she had been getting up in the middle of the night while they were asleep, sometimes playing the game until 5am.
The youngster is now working to get her life back on track.
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But experts fear many children are at risk of developing mental health problems as a result of over-exposure to violent and addictive video games.
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And professional gamers are making up to £500,000 (NZ$953,000) a month from live-streaming their matches for addicted children to watch. Pope went on to say that he has never seen anything as "potentially damaging" to children as Fortnite addiction.