Succubus Harem is a 3D adult sexual simulator made by GRAFAITH in Unity, using 3DCG and AI CG visuals. It presents a fantasy harem scenario with monster girls, and you play as a slime that can slip, slide, and squeeze into places. The game emphasizes real-time physics, letting you choose succubi and viewing angles while exploring your own personal harem.
This is a demo version 1.32, released September 13, 2025 for Windows. It is available in English and Japanese and is uncensored. The latest update focuses on controls for gamepads and VR controllers, moving some actions and body type changes to dedicated buttons, adding stick rotation, and supporting full analog movement and rotation. It also displays changed key bindings, keeps the Dark Succubi Normalization Gauge visible, and makes the slime body more transparent.
Developer's description
Succubus Harem is a fully 3D sexual simulator where everything moves with real-time physics. You become a slime—able to slip, slide, and squeeze into any place you desire. Choose your favorite succubi, your favorite angles, and enjoy total freedom as you explore your own personal harem.
V1.32
We’ve greatly enhanced controls for both gamepads and VR controllers:
Actions that previously required multiple keys can now be executed with dedicated buttons.
Body type changes that required multiple keys can now be performed with a single dedicated button.
Rotation can now be controlled with the stick.
Movement and rotation stick inputs now support full analog control.
With analog stick movement and rotation, fine adjustments are now much easier!
Display & UI Improvements
When key bindings change (such as in Direct Menu or panel operations), the corresponding keys are now displayed.
The “Normalization Gauge” for Dark Succubi is now always visible.
Increased the transparency of the Slime body, making it easier to see objects hidden behind it.
Behavior & Stability Improvements
Upgraded the game engine version for improved stability.
Enhanced Succubus behavior control.
Other Improvements
Updated the manual.
Minor adjustments and refinements.
* These improvements are also applied to the Demo version—enjoy!
Player reviews
Player rating1.0 / 5 · 2 ratings
Written reviews2 · avg 1.0★
Positive (4–5★)0%
Latest review2025-10-07
JoshHansen2025-10-07★★★★★
I have never left a review before, but this is the absolutely worst piece of horrible trash I have ever seen. I can't find a single thing about it that is remotely half decent. Maybe the models, if they weren't…
pta_madre2025-10-06★★★★★
I literally started the game, tried it for less than 2 minutes, and realized this game was a piece of crap. Don’t waste your time on this, seriously, don’t. Just move on — it’s horrible. The controls are awful, the…
★★★★★(2)
