Duchess of the Underdeeps is a Ren'Py point-and-click sandbox by Man from icecream van, presented with animated 2D AI CG art. You play Jenny, a female speleology student whose university cave expedition, led by a professor, is interrupted by a collapse. She is separated from the main group and trapped in an unexplored underground area, featuring fantasy, monster, and paranormal themes.
The current public build is v0.06, released October 10, 2026, for Windows, Linux, Mac, and Android, in English. Development is ongoing. The latest update completed the final tomb and remaining episodes before Act 1, added 1,300 code lines, and introduced 150 new artworks. The build is officially marked uncensored, although some scenes were changed; patches may restore earlier content.
Developer's description
The premise of the story is that a university expedition of speleology students, led by a professor, heads out to investigate an interesting cave…
And then a collapse happens. Jenny ends up cut off from the main group, trapped alone in an unexplored section of the cave.
Well… alone. Almost alone. Or not alone at all.
Due to circumstances beyond my control, I had to make some changes to certain scenes. You could call it a form of censorship.
If you want everything to be more like the good old days, you will need to use something like a patch.
0.06
Completed the final tomb and the remaining episodes leading up to Act 1.
Added 1,300 lines of code.
Added 150 new arts.
0.05
Added an overlay system for Jenny. Right now the overlays only include clothes — a tank top and shorts. In the future, I plan to use this more for cosmetic effects and things like that. There is a black clothing set and a white one in the inventory: the black one works, but don’t touch the white one yet
Yes, inventory. Now you can actually see something in it. It doesn’t have much practical use yet, but you can use it to dress Jenny, check what items she has, and read their descriptions.
Added a status button. Its functionality is not implemented yet. Later, it will give access to additional information about the character, her clothes, and so on.
Added a map that allows you to teleport to locations on the map without having to walk there manually.
Added two more tomb scenes. If Jenny is wearing clothes, the scenes will work differently — basically, all the most interesting parts will be skipped. I did this for immersion. I’m pretty sure nobody will go there dressed anyway.
I left the first tomb scene unchanged, even though I originally wanted to change it. For now, it stays as it was. There is no clothed version for it yet.
Also fixed a bunch of bugs and added some new ones
0.04
Fixed repeating and stuck messages like "This door is already open" that were showing multiple times
Added an option to permanently enable navigation highlights (can be toggled in Preferences)
Added two new scenes
The random event mentioned earlier was NOT added. That system relies on the same foundation as the buggy message system. Basically — I’ll implement it next time. Fixing the messages had to come first.
0.03
The tomb storyline has been further developed.
You can now access a second location inside the tomb.
You can wash under the waterfall.
And there is one more scene at the end, in a dream.
0.02
Added several story events related to exploring the cave.
Added a new location —
the tomb
(that’s what Jenny calls it; it may not actually be a tomb).
Added two scenes.
Added a quest journal (currently in a simplified form — the map is still planned for later).
Added ambient sounds.
0.01
Two more locations have been added to the cave (four if you count reverses).
With this, the major cave construction is complete - though there will still be background updates and other cosmetic improvements.
A couple of animations have been added to the sleep scene (including a continuation that was previously missing).
An inventory system has been added (it's not useful yet, but it’s already in place).
The quest journal is technically implemented, but it will only become available in the next update because I want to combine it with the map and notes - Jenny will have a notebook where all of this will be displayed.
The map will also allow teleportation in case you get tired of running back and forth - and since that feature isn’t ready yet, the journal isn’t available either
Demo
Initial Release
Player reviews
Player rating4.0 / 5 · 13 ratings
Written reviews13 · avg 4.1★
Positive (4–5★)77%
Latest review2026-09-12
What players say
Most players rate it positively, praising visuals and FMC, while noting early bugs, short content, and confusing navigation.
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Players like
Attractive AI-generated visuals and a well-liked female main character.
Interesting premise, dialogue, and supernatural/cave exploration potential.
Female lead is appealing, grounded, and easy to follow.
Kinky scenes feel hot and fit the adult tone.
Common complaints
Navigation and movement can feel confusing or linear.
Content is short and still early in development.
Audio is missing, repetitive, or poorly balanced.
Best for players who enjoy AI visuals, short kinky cave exploration, and supernatural adult stories.
Summarised from 13 written player reviews.
davy_jones_knockers2026-09-12★★★★★
Perfectly dumb and hotter than it has any right to be. Following with great interest. I don't normally go for FMC games, but Jenny is a good sport and most importantly in a porn game, extremely hot. I hope to…
Skeeve12026-09-02★★★★★
Surprisingly, it's not a Tomb Raider game. I like the FMC, she doesn't panic when something unexpected happens (and she has a lot of fun with the tentacles and the horny goblin), but she doesn't give up and looks for…
anedwcan2026-09-01★★★★★
THIS is what AI was made for Sure there really isn't much choice, but your freedom of navigation makes it OK. And Right now the white tank doesn't seem to work, but that's okay. Make it possible to go topless…