Signal → what to do
- The number doesn’t fit the door sequence—check it first.
- There’s a quiet hum near the door—that’s Dupe. The hum is even louder in the dark.
- If you hear rain, fire, flies, water, or a clock behind the door, it’s real.
- In a dark room, light shining through the door’s seams means there’s a lit room behind it. It’s the real door.
- A growl or scratching near the door means it’s fake.
- Listen up close: you can hear Dupe breathing, too.
- In The Mines, the top-left corner of Dupe’s wooden door is darkened.
How to choose a door: step by step
Dupe’s attack deals 40 damage. But if you have 40 health or less, it drags you into a hole. So don’t guess when your health is low.
1. Check the number on the previous door and figure out what the next one should be. 2. If there’s an odd number of doors, put their numbers in order: the real door has the middle number. 3. If two doors have the same number, they’re both wrong. 4. Not sure? Get close and listen for the hum and sounds behind the door. 5. You can try a Lockpick or Key on Dupe’s door without worrying about losing it: the item stays in your inventory.
Timing helps, too. A timer starts when you open a new door. After that, Dupe smears the numbers on earlier doors and keys—and the farther you go, the faster it happens. I count the numbers before searching drawers, so I can still see them.
Where it appears
Dupe lives in The Hotel and The Mines, in rooms with several numbered doors. It was added to The Hotel in The Hotel+ Update. It can show up as early as Door 2, but usually appears after Door 10. It’s more common in later rooms.
Where it doesn’t appear: rooms with one door, including The Library, The Grand Hallway, and The Electrical Room. In The Mines, it can appear at The Railway Station, and in the Mines tunnels, only in the Meat Room. It can place up to 8–9 fake doors in one room, or up to 11 with Modifiers.
Using the Crucifix against Dupe
The Crucifix banishes Dupe. Hold it in your hand and open the door hiding Dupe to earn the Outwitted badge. The attack stops, the door closes, and blue light shines through the cracks.
You won’t see the actual banishment: the Crucifix is thrown into the room, not picked up. Usually, it’s not worth using the Crucifix on Dupe since it’s easy to avoid. I agree—unless you want the badge that unlocks Modifiers options.
Wrong Number, Battle Of Wits, and Hard Mode
The Wrong Number Modifier makes Dupe show up more often and act smarter. Battle Of Wits goes further: Dupe appears in most rooms and smears the numbers as soon as you open a door. There’s no humming behind its doors in this mode, and if a room is locked, the number on the Key changes, too. Both Modifiers let Dupe attack in dark rooms, too, but it happens less often.
There’s another clue: with Locked and Loaded or Key Key Key Key, Keys don’t spawn in front of Dupe’s doors, so a door with a Key behind it is real. In SUPER HARD MODE, Subspace Tripmine takes Dupe’s place. It deals 190 damage and hits nearby players, too.
How players get caught by Dupe
- Opening a door without checking its number. That’s Dupe’s only trick, and it works.
- Guessing with low health. At 40 health or less, it drags you into a hole.
- Not noticing that the numbers have been smeared. The timer starts when you open a new door.
- Waiting for the Moonlight Candle to go out near Dupe’s door. It won’t.
- Leaving a closet right next to its door. Because its hitbox is so tall, it can attack right away, even if you weren’t heading for the door.
What’s behind the door
Dupe’s room is a box covered in moving black goo that looks like Seek’s slime. After Dupe is banished, you’ll see a pulsing space with a long, winding tube on the ceiling and its hands on the floor.
One theory says the whole room is Dupe’s body, and the tube is its esophagus unconfirmed. If so, maybe Dupes are an entire species unconfirmed. Its name probably comes from how it tricks players, or from the word “Duplicate” unconfirmed.
Dupe in a dark room
Dupe is less dangerous in the dark than it seems. If you approach a fake door, it usually won’t open—instead, the number on the sign just gets distorted. If there are no locked doors in a dark room, Dupe can’t really hurt you.
The problem is finding the real door in the dark without Moonlight or a light source. Light shining through the seams of the real door helps, and Dupe’s hum is louder in dark rooms. Moonlight used to light up Dupe’s door less brightly than usual, but after The Hunt update, the lighting became the same in older versions.
Locked rooms are a separate trap. Dupe can put a fake door there, too, and trying to unlock it triggers an attack.
Dupe and other entities
Rush and Ambush always pass through the real door in a room with Dupe. So if one of them rushes through, you know which way to go. Before dark rooms start appearing, Rush also gives away fake doors by distorting their numbers.
There’s another risk: Dupe and an incoming Rush or Ambush can scare you at the same time. And if Dupe attacks before Screech’s warning sound, you’ll have almost no time to react.
In The Mines, Dupe can appear in the same room during your second encounter with Figure. Gloombats sometimes drive Figure right into Dupe’s door.
The Greenhouse and The Mines: what changes
It’s harder to count in The Mines. There, a fake number can be much farther off from the real one than in The Hotel. After The Mines Update, the difference could be as high as 3, and after The Content Update, as high as 4. In The Mines, Dupe also smears the numbers on its fake doors. Another place is the sewer room with two levels and lots of smaller rooms: Dupe can appear there, but not behind the metal door.
In The Greenhouse, you can spot a clue by looking. Lit fake doors look completely black, while real ones show the next room. It hasn’t been confirmed whether this is intentional or a bug unconfirmed. Sometimes you can see Dupe’s hands through the clear doors in the bright blue void. In The Greenhouse, I look through the doors before checking the numbers. It’s faster.
One annoying thing: ever since Dupe was added to The Greenhouse, its hitbox has been unusually tall. Don’t hang around close to its door.
Dupe badges
There are two badges for Dupe, and most players have both.
- Wrong Room — open Dupe’s fake door. Description: “Well this is awkward...”. Almost everyone gets it by accident.
- Outwitted — hold the Crucifix in your hand and open the door hiding Dupe. This badge is hidden and secret, and doesn’t count toward progress. Description: “The duper becomes... the dupee.”.
I wouldn’t risk a good run just for Wrong Room: open a fake door when you have more than 40 health, then keep going.
Fun facts
- Dupe was added to the game on January 28, 2023.
- When it attacks, it says things like “Knock, Knock.”, “You've been duped.”, and “Wrong choice.”.
- Its jumpscare audio is called imacreepimaweirdo—a reference to the song “Creep” by Radiohead.
- Its hands were fully shown only in the Floor 2 update. Before that, they were visible on the Wrong Room badge.
- Dupe was one of seven entities on the game icon.
- It was hidden in the corner of LSPLASH’s Twitter avatar.
- Dupe’s position is chosen randomly; the Seed doesn’t affect it.
- Dupe and Louie are the only ones you can’t see during a Crucifix banishment.
Where it appears
all locationsRelated badges
all badges
Frequently asked questions
How do you find Dupe in DOORS?
How much damage does Dupe deal?
Which door can Dupe appear at?
Can the Crucifix stop Dupe?
How do you find the real door if the numbers are smeared?
Can you open Dupe’s door with a Key or Lockpick?
Is Dupe in The Library?
What can you see behind Dupe’s door after using the Crucifix?
See also
What’s Still Unconfirmed (6)
This information comes from announcements and rumors, or is outdated. The label will disappear once it’s confirmed.
- 1Some think the room is Dupe's body and the pipe is its esophagus.
rumor, unconfirmed · source - 2This theory may also suggest that Dupe belongs to an entire species of entities.
rumor, unconfirmed · source - 3The name Dupe may come from the entity tricking players into choosing the wrong door.
rumor, unconfirmed · source - 4The name Dupe may also come from the word "Duplicate."
rumor, unconfirmed · source - 5Before The Hunt Update, Moonlight lit up Dupe’s door in a dark room less brightly than a regular door.
outdated; this was in older versions · source - 6It's unknown whether the black look of Dupe's fake doors in The Greenhouse was intentional or a bug.
rumor, unconfirmed · source
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