What is UEFN?
Unreal Editor for Fortnite is a new way to design, develop, and publish content into Fortnite that takes advantage of the Unreal Editor’s development workflows and proven PC-based toolset. Over time, UEFN will evolve to feature most of the same tools available in Unreal Engine 5 (and beyond) that enable the publication and distribution of experiences on a massive scale. Today’s Public Beta release is the first major step towards achieving this goal.
UEFN works side-by-side and is additive to Fortnite’s existing Creative toolset. Launched in 2018, Fortnite Creative is a sandbox editing mode in Fortnite that enables creators to level edit, modify the environment and game mechanics, and publish in-game playable islands.
“Islands” are playable game experiences that, once published, are accessible to all Fortnite players. Creator-built islands, games, and experiences are incredibly popular: more than one million player-built islands have been published by their creators, and more than 40% of player game time in Fortnite is spent in creator-built content.
With Fortnite player accounts currently over 500 million, millions of players are searching for, playing, and coming back for new content beyond Battle Royale every day.
Source: Unreal Engine Blog