Cover for Duchess of the Underdeeps

Duchess of the Underdeeps v0.04 public

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Duchess of the Underdeeps is a adult sandbox game developed by Man from icecream van, built with the Ren'Py engine. It was first released in November 2025 and last updated in June 2026. The game runs on Windows, Linux, Mac, Android and is available in English.

Overview

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.​

Features

Duchess of the Underdeeps features themes and elements such as sandbox, sci-fi, stripping, teasing, tentacles, vaginal sex, ai cg and animated.

Frequently Asked Questions

Is Duchess of the Underdeeps free to download?

Yes. Duchess of the Underdeeps is free to download, with links to the available builds listed on this page.

What engine is Duchess of the Underdeeps built on?

Duchess of the Underdeeps is built with the Ren'Py engine.

What platforms does Duchess of the Underdeeps support?

Duchess of the Underdeeps is available for Windows, Linux, Mac, Android.

What language is Duchess of the Underdeeps in?

Duchess of the Underdeeps is available in English.

Screenshots

Download Links

These links lead to external hosting providers. Use at your own risk.

Developer Notes

•Thank you for playing my game. If you enjoyed it, please consider supporting its development.

Changelog

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

More links may be in the source thread (registration required).

Source Thread

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