Borderlands 3’s Maurice-focusedRevenge of the Cartelssends players to Villa Ultraviolet to do battle with the Eridium Cartel gang. This content brings a slew of new baddies,as well as awesome new Legendary weapons and gear into the fold. Once a seasonal event, this extra content has since been added to the game permanently as of April 2020.
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There are a number of Revenge of the Cartels Challenges for fans to complete while they are there—one of which tasks them with solving a rather cryptic hidden puzzle in the Ultraviolet mansion. For those players looking to finish the “Every Mansion Needs a Puzzle” Challenge inBorderlands 3, this guide provides the puzzle’s location and its solution.
Updated July 16, 2025 by Stephen LaGioia:Gearbox’sthrilling RPG shooterremains a draw for newcomers and seasoned vets alike, with its bounties of satisfying loot and exciting gameplay. This momentum is further spurred by a steady flow of post-release content in the form of DLC packs and seasonal events such as the Designer’s Cut and theHalloween-themed Bloody Harvest challenges.
GivenBorderlands 3’s continuing legacy—and Revenge of the Cartels' status as a permanent addition to the game—it seemed fitting to revisit this guide. The information has been updated and details have been added to help players get through the puzzle.
Where To Find The Mansion Puzzle
Players looking for a visual reference can find one in the images and map locations below:
Once the player has locatedBorderlands 3’s mansion puzzle, they can then proceed to solve it. This begins by interacting with the aforementioned keyboard on the desk. This will cause a series of shapes to appear on the four monitors that are positioned directly across from the keyboard. Make a note of theorder of these shapes from left to right, as this will be the key information needed to solve the puzzle.
Now, head to thewest end of the room, and players will find two bookshelves against the wallthere. The bookshelf on the right is the key to solvingBL3’s Cartels eventpuzzle, and players should specifically direct their attention to the bottom three shelves. At the lower region of these shelves, players will find apyramid, cube, and orb. Each of the objects represents one of the shapes shown on the monitors.
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At this point, look to the shelves above the pyramid, cube, and orb,noting the positions of the gold leaf-like objectsthat sit in the bookshelf. These represent the three columns and numbered positions corresponding to each shape. Clearer visual representations of these corresponding shapes are laid outcourtesy of Youtuber DPJ.
Once these positions are confirmed, players can then use this graphic (from Reddit user SnipingPandaz) totranslate those positions into numbers.While not perfectly aligned, the numbers—marked by the empty shelf spaces—are ordered from left to right and top to bottom (fittingly like reading a book):
The positions of the gold leaves will always be random, so there’s no single definitive solution to this puzzle. But as an example, here’s how to read the solution in the above image:
These numbers should then beput into the order of the shapes that appeared on the monitorspreviously, and this will give the code needed to complete the Villa Ultraviolet puzzle. For example, if the monitors in the instance above showedsquare, triangle, triangle, circle,the solution would be2449.
With this code in hand,go to the bookshelf directly behind the desk with the keyboard, and there will be illuminated numbers on the spines of several of the books in that case. All that is left at this point is to interact with these numbers in the order that was just determined.
Doing so will completeBorderlands 3’s Every Mansions Needs a Puzzle Challenge. Players will then gain access to a secret room withsome great loot to have fun with.
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