https://www.polygon.com/2018/10/22/18008926/fornite-save-the-world-mode-free-to-play

Fortnite’s popularity is mostly due to its battle royale mode, but the game originally launched as a co-op experience that still exists in the game’s for-pay Save the World mode. Players need to purchase a $39.99 “founder’s pack” to play Save the World, but Epic Games has stated that the mode will become free in 2018.

“We decided to move the free-to-play launch of Save the World out of this year,” the Fortnite Team explained in an official blog post. “We’re working on a broad set of features, reworks, and backend system scaling we believe are needed to go free-to-play. Save the World has grown consistently since our launch in July 2017 and Fortnite overall has experienced unprecedented growth. Scaling up for the legions of player heroes who will be joining the fight is key to providing an excellent experience. This applies to all of our players, old and new, so we’re taking the time to get this right.”