Quick Search:

Game Information
$ 14.95
Release Date
Last Update
Orig PC Gender
Adult Themes

User Generated Tag Cloud

panda pretty much all furry heat multibreast tiger APK / Android version available Turkey cowgirl fox frog Supports user mods oviposition dogherm Paying dragon Spider inflation lactation catgirl minotaur naga slug elephant Includes editor

Version: 20

The Underworld
by SkyCorp

The Underworld is a text based transformation fetish game including content such as: furry, monstergirl, transgender, oviposition, lactation and other such adult fun.  It is still a work in progress.


Game website & dev blog now online at http://skycorp.global


Just released: r20 (Public Build)

For public build players, r20 is the first build with Cloud Save/Load, Custom Name Entry, and Mobile/APK Support.  For private build players, it also adds some improvements around save/load.  As this is the first large scale test of save/load, please be aware there may still be bugs!  [full blog post]


Recent update summary:

  • r5 [public] - UI improvements, including the popularly requested customizable font size [details]
  • r6 [private] - Weight TF system - Eat food to replenish HP, but if you over-eat you will gain weight which will make your belly difficult to conceal [details]
  • r7 [private] - Panda TFs - Transform into a panda [details]
  • r8 [private] - Cowgirl TF - Transform into a cowgirl, lactate, at high levels grow an udder [details]
  • r9 [private] - Chapter 4: Cowgirl Farm - The next story chapter, which includes forced TF into cowgirl [details]
  • r10 [private] - Shop system [details]
  • r11 [public] - Bug fix & public build [details]
  • r12 [private] - Added Elephant TF, Cat TF, and multi-breast TF (five new transformation items total). [details]
  • r13 [private] - Chapter 5: The Pound (Catgirl Stripclub TF) [details]
  • r14 [private] - Horse TF (horsedick / autofellatio), Tiger TF (multibreast), Turkey TF (inflation) [details]
  • r15 [public] - Public release of: Horse TF, Tiger TF, Turkey TF, multibreast items.  Also adds portable milker.  [details]
  • r16 [private] - Mobile / Touch support & APK build [details]
  • r17 [private] - Female Spider TF (egg laying) [details]
  • r18 [private] - Monster Mods, Male Spider, Custom Name Entry [details]
  • r19 [private] - Save support [details]
  • r20 [public] - Public release of: Cloud Save/Load, Custom Name Entry, Mobile/APK Support [details]
Login: nixie
Password: *****

.// Welcome to SkyCorp Employee Mainframe //--
MOTD has been updated by root in the past seven days

> motd

Attention! All SkyCorp employees are to be alerted of outbreak of VIR-819 in Mulberry and surrounding areas. Original infection of virus into human populace traced to -REDACTED-.

Progressive exposure of the virus causes mutagenic effects in human subjects. Infected are highly contagious, causing additional mutagentic effects on humans they contact. So far, documented mutagenic effects have included: hybrid fox transformation, hybrid dragon transformation, increased libido, gender changes, and oviposition. Due to the chaotic nature of VIR-819 and the denizens of the Underworld, the infected are likely to encounter all prior mutagenic effects listed. Additional mutagenic effects are expected as the virus evolves.

SkyCorp has lobbied and received regional government funding to build the Underworld, an underground complex where infected creatures are mandatorily required to relocate to upon discovery. Investigative journalists have indicated this network contains at least one shantytown, a sewer dungeon, some sort of mysterious temple, and various connecting passageways. However, SkyCorp personnel must strictly occupy only the town of Mulberry and other overworld areas for their own safety, unless they have received designated security training. Additional areas are expected to be found as exploration of the network continues in future.

Employees should encourage Mulberry citizens to be ever vigilant of signs of infection. Infected creatures have been known to mask their mutations with clothing and feign humanity -- but these creatures are dangerous and must not be allowed to run free due to their changed nature. SkyCorp has identified at least one suspected sympathizer in town who has been providing aid.

Employees interested in researching The Underworld/VIR-819 are requested to download the training materials.

A recent copy of Adobe Flash will be required (Flash 11+), and employees are requested to file a summary report on their experience in Mulberry and surrounding areas. Prospective trainees are advised as to the early and experimental nature of this program.

> logout

Latest Reviews - View All Reviews

Review by RedGhost

Version reviewed: 18 on 05/14/2016

v18 (Public):

I've played through what's available on the Public build (free) and what i saw was interesting. The story can seem a bit threadbare, but it picks up over time as you meet people and learn more about the world you're in. The transformations are varied and there are multiple ways to trigger them, which can sometimes catch you out if you trip a TF change that's almost impossible to avoid. And the main characters that you run in to for the most part (at this version release) okay, with filler "merchant" NPCs on the side to cover the core elements.

Would I pay for it? Maybe, but the extra content I'm missing out on right now if I pay isn't enough. Sure it looks interesting, but for the set price I don't see the value of money there for me to do it.

Perhaps with future updates my opinion on the paywall will change. But as of right now with the free version it's certainly worth a look.

Review by darth123

Version reviewed: 14 on 11/28/2015

Good game. I'll play it again sometime.

Review by HelloworldIizded

Version reviewed: 14 on 11/26/2015

To the people complaining about the $15. The game is free. If you want to play the private build that's another story.

Now, on to my actual review.

I like it. It's a great game and has a lot of potential. The map seems to be disorganized a bit, but it's very minor. A few bugs here and there especially at this one part.

Here's a story of how I stumbled on to the bug.


I went to fight the Naga Queen and I won. I picked up the Golden Cock Ring and wore it and wore the C Cup Latex Bra, which caused my lust generation to skyrocket. I didn't realize this until I was caught masturbating by the po-po and was beat over the head. Then I got my humanity back because I needed to start the Dragon Queen quest. And then the police came and I was knocked unconscious. Then I went to get the Cock Ring curse removed. Once I got the Cock Ring curse removed, I couldn't get the Bra removed because my acceptance went down to zero for some reason. So I went to start the Dragon Queen quest first and while my transformation was starting, I went back into the sewers to fight and get my acceptance up. But my lust generation was still too high so that I accidentally ended up losing to a slug girl. I had the prompt to resist or to give in to the slug tf so I decided that I would still end up as a dragon anyways if I gave in, so I gave in. But once I became a slug girl again, the movement buttons disappeared. I could interact with the sleeping slug girl (which did nothing) and use my items and masturbate, but I couldn't move. I masturbated for ten to fifteen turns straight (thank goodness for the high lust generator, which also increases lust when I look at the sleeping slug girl and when I look at my inventory) until I realized that this was gg for me. I then rage quit and proceeded to write this review. Thanks for the game while I could still move.

Other than that one minor setback everything was great.


Review by Shmoj80

Version reviewed: 11 on 03/05/2015

The content in the game so far is quite good, although it needs polishing in places.


The main negative thing surrounding this game is the paywall. Is it worth the money? In my opinion, not yet. Big word being yet. If the updates keep coming and are of the same quality I have no issues having spent a few bucks on this.

Review by Kips

Version reviewed: 9 on 01/11/2015

Honestly, when I played this game a few months ago, it was a neat little game. There was some content that was clearly meant to be there but missing, and I'd like to come back to the game. However, I'm not paying a single cent to experience your game to beta test it. I have no idea WHY you thought this was a good idea, seeing as how the game is literally in its alpha stages. I would consider it if the game had a large amount of content, but unless you somehow managed to fit in at least 10 times the content you had a few months ago in such a short timespan, it's not worth a single dime.

Total Games: 1,085
Total Contests: 25
Total Reviews: 7,549
Total Engines: 29
Total Adult Themes: 8
Total Transformation Themes: 24
Total Multimedia Themes: 9
Total Online Plays: 1,636,194