Fortnite Chapter 2 challenges continue to roll out on PS4, Xbox One, PC, Switch, and mobile. While we've already had several sets of them, you can go back and complete these challenges any time during Chapter 2, Season 1, which ends in December. Completing each bundle--such as the Open Water challenges--will unlock an associated loading screen, which is hiding a secret. Once you have the loading screen, you can hunt down the secret for another challenge, which asks you to search the hidden O in the Open Water loading screen. If you need help finding the O, we've put together this guide showing you exactly where to go and how to complete the challenge.
Where Is The Hidden "O" Location?
Similar to the secret Battle Stars from past seasons, the location of the letter O is hidden in a special loading screen. Once you've unlocked the screen, you'll need to scour it carefully to see where the letter O is hiding around the island.
You'll unlock the loading screen in question when you complete eight of this week's Open Water challenges. That should be easy enough to do, as most of the tasks are fairly straightforward. If you need help mopping them up, you can find our tips for the Open Water challenges here. You can see the loading screen in question below; we've circled the small O to help you pinpoint it.

The loading screen depicts two characters reeling in a Slurpfish at one of the many bodies of water around the island. The O can be spotted just beneath the dock surrounding the white building, which is located on the northernmost edge of Craggy Cliffs--that's where you'll need to go to find the letter.
How To Complete The Challenge
Once you know where to look, make your way to the aforementioned building in Craggy Cliffs and the letter will appear when you approach. Interact with it to collect the O and you'll complete the challenge. If you need a visual guide, we show you exactly where to go in the video above.
This is the second hidden letter thus far in the season, with six more to go until you spell out "FORTNITE." If you still haven't found the letter F, be sure to consult our hidden F location guide. You can also check out our other Fortnite Chapter 2 coverage below.
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