Fortnite's Downtown Drop limited-time mode is still underway, and it comes with its own set of challenges to complete and rewards to unlock. Most of these are pretty straightforward and can be cleared with a little persistence, but one that'll require a bit more work is to search O-N-F-I-R-E letters. These are scattered all over the map, which is tricky to navigate thanks to your character's slippery movement, so you may have some trouble finding them if you don't know where to look.
In the video above, we show you where all six letters are located. Note that it isn't enough to simply find the letters; you'll need to manually interact with them in order to make progress in this challenge, but once you know where to go the mission should be a breeze. You can find more details to help you complete this challenge in our written guide. Once you've found all six letters, you'll unlock a stylish back board for your troubles. You'll need to act fast if you want the back board, however, as the Downtown Drop LTM is scheduled to end June 3.