Fortnite is back online after almost three hours of downtime.
The video game was taken online to enable developer Epic Games to add new content to the title to commemorate the first anniversary of its launch worldwide.
Fortnite v5.1 includes a swathe of new limited time missions, as well as a new in-game weaponry, skins and content for players to unlock.
The video game went offline a little after 9am BST (4am ET), with Epic Games announcing the scheduled downtime had ended an hour later.
However, thousand of fans were still unable to access the successful title, which is currently available on Sony PS4, Windows PC, Xbox One, iOS and Nintendo Switch.
As the issues persisted, Fortnite acknowledged the difficulties by tweeting from its official account: 'We are aware of some players unable to access Birthday Challenges, they are currently being deployed to everyone!'
As of 12:15pm BST (7:15am ET) the issues appear to be resolved.
Fortnite first launched on July 25 2017, with the latest update marking a year since its initial release date. As a result, the birthday cake distributed throughout the game after the latest update has a large number '1' candle on its top.
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The latest Fortnite birthday celebrations will run until August 7 and includes additions to both the Save the World mode and the Battle Royale option, Epic Games has confirmed.
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