If you complete 8 challenges in a given mission you get a loading screen, and in that loading screen is one of the letters “F-O-R-T-N-I-T-E”. Get all of them for the season long challenge skin.

So, as a reminder, each of the six Fortnite O-N-F-I-R-E letter locations can be approached in any order - the letter 'F' is not in any fixed spot, it'll just be the one you find first.

Fortnite: Chapter 2 New World loading screen If you look closely, you'll be able to spot the F near Lazy Lake, one of the new named locations that appeared with the start of Chapter 2.