Into the Monster Girl Hole is a Ren'Py adventure by Calabi-Yo-Manifold. You play as a tired worker who gets a rare chance to visit a parallel fantasy world. That world is male-free, filled with monster girls, and organized around adult needs. It is mostly text based, using AI generated backgrounds, so it currently has few explicit visual scenes and leans on imagination. The tone mixes fantasy, humor, and adventure.
The current build is v0.2.4, released September 13, 2026, and development is ongoing. It runs on Windows and Linux in English, uncensored. The latest update adds seven new monster girls and a very difficult puzzle, with a walkthrough available if needed. Earlier changes expanded lore, scenes, achievements, and many new monster girls, but v0.2.4 focuses on those additions.
Developer's description
Going to bed on a Tuesday sucks, still 3 more days until it's weekend. 5 days of work, 1 day of regeneration, and 1 day of peace. Rinse and repeat...
Not for you though! You have the once-in-a-lifetime opportunity to visit a parallel world, a world that is dependent on cum, knows no males, and is filled to the brim with monster girls, pursuing what only YOU can give them.
There is only one question: will you go into the monster girl hole?
Info: This game is mostly text-based, with AI images as backgrounds. So please note before downloading that there are hardly any visual sex scenes in the game yet, it all utilizes the most powerful graphic card of them all: imagination.
v0.2.4
- 7 new monster chicas
- crazy-ass, difficult puzzle (walkthrough is your friend if needed)
v0.2.3
- 23 new monster girls
- New Mili and Ilim scenes
- HUGE lore progression
- A hypermetric fuckton of new content (like, 3 updates-worth of it)
- Free roam2 new achievements
v0.2.2
- 9 new monster girls
- 3 new subspecies
- fun puzzles
- 1 new achievement
- Mili, Chaaya, and Vruće have been reworked
v0.2
- 8 new gals
- 3 new achievements
v0.1.12
- 2 new monster girls
- Mili's, Ilim's, Sweety's, Chaaya's, and Marissa's pics have been updated, as well as their scenes and the intro of the game (no story changes, you don't have to replay them)
- Looooooooore
v0.1.11
- 25 new monster girls
- Massive lore drops
- 3 new achievements
v0.1.10
- I have no idea how to even count the amount of new monster girls... It's between 28 and 34, depending on which way you count
- Overhauled Devil species descriptions
- I removed the 'lesser devils' subspecies and added the 'chimeras' one
- Some of the serious/disturbing/depressing scenes have been dialed back a bit
v0.1.9
- 13 new monster girls
- a new species: Shapeshifters (with its respective subspecies, them being beastkin, birdkin, insectkin, kitsune, medusas, and merfolk)
- a few bugfixes
v0.1.8
- 12 new monster girls, plus a few returning faces
- 2 new species with their respective subspecies, and 2 new subspecies for existing species
- 1 new achievement, and you'll know where it is
v0.1.7
- 13 new gals
- slight file size reduction (I could've reduced it even more but at the expense of MG pic quality. For now, I don't want to do that)
- Cool puzzles... Maybe. You'll be the judge
- The scene replay for MGs shouldn't be able to break anything anymore now
v0.1.6
1) I've added one line of code to the beginning of the game which, of course, people with a save file won't be able to see so I'll copy-paste the exact message here:
"WARNING: This game may contain disturbing and/or depressing scenes/images as well as graphic violence. Also, general trigger warning just in case. If you cannot handle that, stop right here."
2) I've started to notice more and more errors in the code when it comes to handling variables and the catalogue scene replays as well as other problems there. I'll just issue a careful warning not to save the game DURING or AFTER a replay, just in case. Sadly, in order to fix these things how I would want them to be fixed would change the code so drastically that your save files would become unusable, which is something I will try to avoid at all cost. I don't know if one can actually break a save through scene replays but I wanted to mention it anyways. Who knows, maybe someone out there wants to abuse this to get some funny results
- 18 new monster girls, including one main character and one... Secondary main character? Is that how you say it?
- A shitload of new content, the most since the initial version of the game
- Plenty of minigames/puzzles etc., I even thought of and implemented an entire card game that you can play (not really a fair one though)
- 3 new achievements, evil as always
- Funky new soundtracks (since the update is so long, I created multiple because I didn't want people to get sick of them)
- Some bug fixes... I think. As always, I didn't write down what I fixed and forgot
v0.1.5
- Mili has new dialogue images to match her picture
- Ilim has a new look, now she looks like I imagined her
- All existing scenes have been altered and received some 'upgrades'. In this regard, please check out the infopost
- Continuation of the story with 6 new monster girls... Or was it seven?
- Some minor fixes
v0.1.4
New content:
- New monster girls: 12
- Xray panels for a more immersive sexytime experience (I repeat though, don't expect too much from them. Making them requires a lot of manual editing which I SUCK at, but I think they serve their purpose)
- Sexytime scenes now have sound
- They ALSO have cum overlays now
- This update is free roam, so have fun exploring
- 2 new achievements
Changes:
- I wasn't happy with the robots species, as the most robotic subspecies (robot girls) weren't 'robotey' enough for me, so I added a new subspecies: true robots! They are as close to actual robots as you can get. With this, a bit of dialogue has been changed from the previous update.
- I also wasn't happy with Py-Thon's non-ahegao dialogue images, so I overhauled all of them.
- ........ I also wrote down a note that I changed something regarding the clarification of the rules of creation, but I don't understand what I meant there lol. Oy vey, what a developer you have here...
v0.1.3
-New monster girls: 12 (of which 5 have only been introduced, they don't have any scenes yet)
-Changes: None (I think)
-New stuff: Alright, this is the big one: I have mentioned this in a progress update already, so here it is again: We'll be having X-ray penetration panels from now on! Woooo
! They may not be perfect, but they are good enough for me, and that is what counts for me. I'll have them for sexual acts that are not easily apparent from the monster girl image, so no pics of titfucks, bjs, handjobs, etc. (unless they are NOT easily apparent). Sex, anal, and everything that is hard to imagine from looking at the image will have them though. One girl in this update will have such a pseudo-animated sex panel already, but every encounter going forward will have them, as well, as long as the conditions are fulfilled. Existing encounters will get them eventually, as well.
v0.1.2
New Content:
8 new monster girls
Changes:
- added a new feature: Premonition Mode! When activated, it will display possible fetishes before every encounter. You can activate it at the start of the game.
IMPORTANT NOTE: If you come from 0.1 and already have a save file but want to activate this mode, do this while in your save file:
SHIFT + O --> copy and paste the following: premonition_mode = True --> press enter --> press ESC
- I've overhauled the catalogue, now text is bigger and should be easier on the eyes
- All hideous black infoboxes (that you actually could scroll out of, lol) have been kicked out and replaced with dedicated screens. This includes all info boxes in the catalogue and in the item menu
- The meme onslaught was a bit too much even for my taste and has been turned down a bit (I've also slightly changed 0.1.1 scenes in that regard, but not by much)
- humor has been either reduced or axed from sexytime scenes, as this is where players should fap, not laugh
- Some bugfixes
Small changes:
- a small notification has been added to the catalogue when you first open it, pointing players to the 'sort by biome' option
- the volume of the frostmare hound's roar has been reduced
- Chaaya's assistant has been renamed from M-ARCY to Enco-Deco (the reason for this might become clear next update)
- some more slight changes that I've forgotten about because I am an idiot and didn't write them down as I implemented them -sigh-
v0.1
Initial Release
Player reviews
Player rating4.0 / 5 · 14 ratings
Written reviews14 · avg 3.9★
Positive (4–5★)79%
Latest review2026-08-31
What players say
Mostly positive, with strong writing and monster girls offset by text-heavy sex and AI art concerns.
5★6
4★5
3★1
2★0
1★2
Players like
Writing and dialogue are engaging, with layered lore and character bonds.
Monster girls lean into exotic, monstrous designs rather than safe humanoids.
Humor and self-aware dialogue keep the game engaging.
AI-generated art is often praised as acceptable for the VN.
Common complaints
Sex scenes rely too much on text, with few explicit images.
Some players found the story or dialogue uneven and incoherent.
Players may miss content without a walkthrough or clear opt-out warnings.
Best for players who enjoy humorous, monster-girl-focused VNs with exotic designs and layered lore.
Summarised from 14 written player reviews.
rectifier00012026-08-31★★★★★
I have enjoyed the insane horny ramblings of the geometric form, and would both highly recommend and strongly caution against accepting offers from pink haired goddesses in your dreams, 10 out of good and would feel my heart ache at…
Jogo1292026-01-06★★★★★
I normally don't give review to games simply because when I don't like it I simply move on and when I actually like it I don't have a clue on how to proceed but this game convinve me that I…
Retrofire2025-12-31★★★★★
Reviewed as of v0.1.1.12 - End of Intro The author of this game has a big imagination. The lore is layered and even if he made it up as he went, to me it doesn't feel like it. This is…