Unnatural Instinct is an adult Ren'Py visual novel by Merizmare, presented with 3DCG animated artwork. You play as a protagonist who returns after a year apart from family members who moved to a new house. The story focuses on getting to know those relatives again while meeting new people, and it includes harem, cheating, and futa/trans themes.
Development is ongoing, with version 0.8.5 released on May 28, 2025. It runs on Windows, Linux, and Android, supports English and Russian, and is uncensored. The latest update adds 772 new images, 23 new animations, and reworks 55 older images, mostly from version 0.2. It also adds a replay gallery, lets players choose roles for the girls they live with, and includes minor UI and visual fixes.
Developer's description
After a year of separation from your family who moved to a new house, you come to get to know your family again,
but on the other side, meet new people and save the princess from the castle, oh no, this is from another game.
v0.8.5
772 new images
23 new animations
55 old images reworked (mostly from version 0.2)
Replay gallery added
You can now choose roles for the girls you live with
Minor UI improvements
Small visual bug fixes
Below is a list of scenes that have been expanded, but it's better to experience them yourself first.
v0.2
New dialogue on the couch with Jennifer
You can now touch Ashley’s boobs and spank her
Jennifer’s dream scene
v0.3
New way to start the day
Visit to Charlie’s place scene expanded
v0.4
Ashley masturbation scene expanded
You can grab Jennifer’s breasts
Dream scene with Jennifer
v0.5
Different morning scene
Toilet stall scene with Claire expanded
v0.6
New versions of the morning scene with Kelly
Scene at Nelly’s room expanded
Scene with Jennifer and her breast-help expanded
More scene variations in Kelly’s room at the end of the day
v0.7
Morning scene with Kelly expanded
Scene with Sophia and Jennifer expanded
Dream scene with Kelly expanded
v0.8
Hospital scene expanded
If you don’t plug Charlie, you’ll get anal sex
Club scene with Nelly expanded
Eva’s scene expanded
v0.8
838 new images and 12 animations
v0.7
680 new images and 14 animations
v0.6
546 new images and 8 animations
v0.5
Warning! Starting from version 0.5, loading old saves can lead to unpredictable errors, even computer explosions (bad jokes), so, starting with version 0.5, begin a new game!
480 new images and 8 animations.
In version 0.2, when you first meet Nelly, the option to choose her gender has been added (old saves don't work correctly because of this).
There are some minor interface improvements, with the most significant one being the ability to hide the text box (dark screen behind text) in the game settings.
v0.4.1
Fixed the English translation by
Saint Blackmoor
v0.4
Fixed a bug that led to a system failure (probably)
Added rtx and dlss 4.0
Just kidding
411 images and 7 animations
v0.3.1
Fixed the English translation by
Garybaldi
v0.3
460 renders and 4 animations
v0.2
Initial Release
Player reviews
Player rating3.5 / 5 · 20 ratings
Written reviews20 · avg 3.7★
Positive (4–5★)50%
Latest review2025-08-17
What players say
Reviews are mixed: several players praise visuals and humor, but others criticize the protagonist, thin plot, and limited choices.
5★8
4★2
3★6
2★4
1★0
Players like
Good renders and animations
Funny, meme-filled humor
Attractive characters and plentiful sexual scenes
Common complaints
Protagonist looks inconsistent and has an annoying personality
Weak plot and limited meaningful choices
Formulaic incest premise
Best for players who enjoy humorous Ren'Py erotic games with strong visuals.
Summarised from 20 written player reviews.
thaeral2025-08-17★★★★★
**Update** I had a recent epiphany regarding the propensity of Developers to create Main Characters that are submissive, anti-social or at most para-social, terrified of everything, behave like lifelong virgins, etc. I just saw the first episode of "My Dress-Up…
SingularityEvent2025-07-06★★★★★
Classic silly homecoming story, nothing wrong with it and nothing new. Renders are good and high quality, dialogue and writing is decent. Biggest problem is also the usual, the MC. He is supposed to be like 19-20 or something like…
Purrfectaim2025-07-05★★★★★
It's one of the best games I've ever played and it has a lot of potential, the character designs seem great to me and I love that it has such well-crafted animations, Without a doubt, a highly recommended game for…