Smilers Den Deluxxx is an adult 3D animated game by Mikifur, built in Unity. You play as a hunter sent into the backrooms to observe and photograph a smiler creature called Karelia. The goal is to finish your tasks and survive the shift, while the creature’s lustful advances may tempt you to give in. It blends furry and monster girl themes with a tense observation setup.
Development is ongoing with the current v411 Steam build, released October 30, 2025, which is a small update rather than a major content release. It fixes a Steam achievement error by reworking the framework and achievement syncing. The game runs on Windows in English and is uncensored. Previous changes included making the smiler less likely to cause random game overs, increasing door and footstep sounds, simplifying camera flashes, adding a one-handed typing mode on PC, and introducing a cheat menu with invincibility and easier task management.
Developer's description
You have been sent to the backrooms to observe and take photo evidence of a creature known as a smiler, nicknamed "Karelia". Can you complete the tasks and end your shift alive, or will you submit to her lustful advances?
v411 Steam
Heya Smilers Hunters! Got a small patch for the error in steam achievements!
-Reworked the frame work and steam achievment syncing.
v1.40
UPDATE 12 October 2025
- Made the game much easier, now the smiler wont randomly game over you as much
- Made the door and footsteps much louder
- Made flashing her on the cameras easier
- (Mobile only) Made allowing saving images to device the default
- Fixed bug where turning off the "Save images to device" toggle will cause game to soft lock
- (PC only) Added one handed mode - Turns the typing minigame into a much easier one (consider this easy mode), so your other hand will be free to do other... activities
- Added a cheat menu that lets you have invincibility, easier task management and more
General optimization of scripts
v1.3 Hotfix
v1.3
Added custom nights! Gain points by playing harder difficulties which can be used to unlock scenes
Added 1 bonus scene, now some scenes are locked behind bonus point requirements
Added hotkeys! Now you can use WASD and SPACE to navigate the menus in game.
v1.1
Futa Mode: Introducing Peen! Toggle it in the settings
Mobile port with optimized graphics and post processing. If laggy, turn on potato mode
Added Jiggle physics toggle for low end devices. If there are deformities in Kar or Mal.O, turn this off.
Added a new bonus scene (Futa only)
v1.0
Initial Release
Early Access
Player reviews
Player rating3.0 / 5 · 10 ratings
Written reviews10 · avg 3.5★
Positive (4–5★)40%
Latest review2025-10-10
What players say
Mixed reviews praise the Backrooms FNAF adult concept, while criticizing shallow waiting gameplay and limited short content.
5★2
4★2
3★5
2★1
1★0
Players like
Backrooms FNAF adult game concept appeals to fans
Gameplay is simple, easy, and quick to play
3D scenes and animations are generally good
Extra scenes provide some bonus content
Common complaints
Waiting for spawns makes gameplay feel shallow
Content is short and scenes can feel limited
Some animations and visuals feel stiff or generic
Best for players who like simple Backrooms FNAF adult games with 3D scenes.
Summarised from 10 written player reviews.
theorangefox2025-10-10★★★★★
Sorta fun, short, more fnaflike than cumrooms. I'd like to see more original characters as this smiley model seems to be just an another asset flip. I mean if your selling point is just a good (somebody else's) model and…
Aryder13372024-09-11★★★★★
Tried it out on PC. The gameplay was pretty meh, not really bad but I wouldn't say it was fun either. Just something to put up with a little to get to the scenes, but the scenes themselves were a…
Archive_2024-06-27★★★★★
I love the backrooms and I love porn having the 2 mix together is awesome. The gameplay is honestly pretty decent and the animations are nice too. I highly recommend this game to anyone whos into this stuff.
★★★★★(10)
