Fortnite's decryption challenge Fortbyte number 13 is located in the "hidden location on loading screen #2". Find it easily with this guide.
To find Fortbyte number 13 of the Decryption Challenge, head south of the map and the three metal dinosaurs. Behind them there is a lodge and still behind this lodge there are toilets. It is inside these that Fortbyte #13 awaits you.
Written by Augustin "TheGreatReview" Héliot. Translated from French by Millenium.us.org.
The challenges and Fortbyte locations of the Fortnite Season 9 decryption challenge, as well as the complete list of Fortbytes, are to be found in this article.