https://www.polygon.com/fortnite/2018/7/9/17549234/fortnite-arg-llamas-europe

It all started with a burger in the middle of a desert. When fans found the Durr Burger mascot, which had conspicuously disappeared from Fortnite’s in-game Greasy Grove location, out in the real world, it seemed like a clear sign that something bigger was afoot. And, as it turns out, they were right.

In the lead-up to Fortnite’s upcoming fifth season, other strange incidents, including agents in Fortnite-style police cars showing up at the Durr Burger, real phone numbers that lead to strange noises and secret messages decoded by spectrograms, started cropping up, pointing to something larger than the game itself.