A downloadable game for Windows

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Dragons, slimes, giant bugs, centaurs and more. This island is full of monsters and they are all... Oddly attractive!?
From Elves to Kitsune; from Mermaids to Androids; myths and science fiction suddenly become a reality as you find yourself on this mysterious island.
Will you uncover its secrets?
Or perhaps you will attempt to get close to these Monster Girls?

Story and Characters

You wake up on an island.You don't know how you arrived there.
You quickly realize this island is inhabited, but its residents aren't normal people. In fact, they aren't human at all!
As you meet the residents you learn that the mysteries go even further, these monstrous residents find themselves in the same situation as you. They also arrived to this island under strange circumstances, they actually come... From another world!?

During Prologue you'll meet a variety of Monster Girls including a nekomata, mermaid, elves, slime, dragon, kitsune, arachne, and many more!
Even more girls planned for future releases. Look forward to yuki onna, centaur, lamia, tree girl and more!


  • Adventure based gameplay, feel free to explore the island!
  • Fully 3D world and characters.
  • Original Soundtrack
  • Multiple dialogue choices and branching events.
  • Costume Shop (no microtransactions here!)
  • A smartphone with no signal.
  • A good boy that likes apples.
  • A bunch of crabs.
  • And of course, you can get close to the girls.


Prologue features roughly 1/3rd of the main story (individual girl's routes not taken into account). It serves as an introductory, standalone, experience before the final release of the game (that won't be free and won't be finished for a while).

I've been working on Monster Girl Island for 3+ years, it's been a journey, but after much learning and many re-doings I finally think the game is polished enough for the public. What you see here is what you'll get in the full release, for the most part. So please look forward to Monster Girl Island if you enjoy this first part!

Release date Jun 20, 2019
GenreAdventure, Visual Novel
Made withUnity, Blender, ZBrush, Paint Tool SAI
Tags3D, adult, Anime, hentai, monstergirl, nsfw
Average sessionAbout an hour
InputsKeyboard, Mouse
LinksSteam, Patreon, Twitter, Community


Download NowName your own price

Click download now to get access to the following files:

MGI Prologue 1 GB


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Viewing most recent comments 8 to 47 of 100 · Next page · Last page

How do I VR?

Need a way to not seeing that one eye girl and spider girl pls, they made me uncomfortable

One eyed girl is part of the story, and spider girl, best you can do is, ignore her and her H-event. Sorry.

can't wait for release

will there be a mac version?

i cant wait to buy the finished game

i can't wait to get it free ... because with all the patreon month i made .... i paid the game final price probably 6 time over ... 

luckily one of the perk was "Get a copy of the game at release! (Only 1 per user)"

Can ya link the patreon pleas??



Is this game still in update ?


He's done with models and everything, all he needs is just to write the last of the chapters which takes the most time, i guess. But yeah it is. (Probably hah)

is this available in windows 7

Have no tried it myself, but i am 100% sure it does work.

so does it work for windows 7 

yes or no?


thanks i will try this 

Whenever I download it goes straight to utorrent and i cant open that.

download in free download manager 5 and if it says forbidden while downloading go back to this link and press again the download to resume i tried it and it works 

I'm not able to start the download when I use my VPN either. I tried to download the game without it and it downloads most of the file, but I keep getting errors saying Download Failed - Forbidden. What gives?

when will new update or new version come out

I have no idea, but my guess is...not soonish, maybe couple months.

I have some suggestions to the designer: the game is playable in medium quality but ... the boot texts are too small, the visual quality is too heavy to run, it has too many loading screens and needless to say, the modules. I know that there are companies that have dedicated departments for that, but compared to other games, I have seen games that consume less resources and equal, even exceed graphic quality. Sometimes It is not necessary to be so thorough with the visual details, if you are looking for quality in the performance. 5 stars I would only give 2.5. (Take as a reference a certain game called "Oblivion". With 768 mb it had an unbeatable graphic quality for pc's whose standard was hardly 2 gb). I don't justify 1gb for such slow development, and define it just as "acceptable". Much performance improvement is needed.

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Lmao, sounds like your computer is trash. I run it on highest graphics with 0 issues. Don't blame the developer for your bad hardware?

The loading screens are literally instant for me.


Thanks for replying, hopefully as well as taking the time to reply you can correct the program errors. On this same page I have tried other games with superior graphic qualities and they do not have such poor performance. But let's see the evidence, do you think? 
My pc's characteristics are: CPU, Intel core i7, Graphics: Nvidia Geforce GTX (8 gb of capacity) 12 Gb of RAM, Screen with 17,3 inches, FHD 1920 x 1980 . I am a beta tester of anothe companies with theis software,  by eleven (11) years. So, pal, I made many tests with another pc's or hardare, with more or less  requirementes for some games. Ypu eors es very poor. Greeting to yoy   

I tried downloading the game but it always failed and it appears with "Failed - Virus scan failed" on the files any advice for my problem 

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You can try downloading it from steam (If you haven't fixed the problem yet) or antivirus is acting up, i download it just fine and it's clear.

Love the game very much(Actually love slime and ara :)

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Just got this today and love the concept of it. Think it would be completely amazing as a fully developed game in VR not just a VN, not that it' isn't great as a VN.


Can I ask Is this latest vision?


With this "Prologue" version it is the latest, which goes up to chapter 3(i think) and if you want more you can go on his patreon and get the official game(not finished) but goes up to half of chapter 4


thanks a lot😀

Im having trouble downloading it 

it downloads in a winrar format but when i open it there's nothing inside

any advice

Try 7zip and don't open the file right click and extract files to(location you want)... hope it helps.

Can we have some Monster Musume characters to interact with? Also how many endings will there be?

how to catch fish ?

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Hello really love this game but it hase one big minus this game is so blurry that it makes my eyes and head hurt, why so much of blur could you please tone it down a bit or add and option to turn it off

F1 brings up the the graphics options if that helps

Olha eu baixei esse jogo no meu pc ele roda de boa as primeiras partes e ele so trava e fica parado quando sai da casa como eu tiro esse erro alguem pode me dizer pq quando eu vou pegar o primeiro evento ele trava


damn my potato PC.....


I wish I could play this in my Mac


heyo I will be making a hentai game for mac its in progress right now but you can follow the progress on my instagam or twitter

instagram: the_protagonist_game

twitter: The_Rapid_P


thank you

Use wineskin

what is that

Just Google 

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so if i get the game on stem, and contribute on patron the how do i get the benefits? i want to make sure my money is going to the right place. or can i get all of it here?


How do you play it on your Xbox


when this is going to be on Mac ??

ive played this on steam. for just the prologue your game is extraordinary and i cant wait to see when the game is finished. love how the graphics are done on the characters and the story so far i so cant wait until its finished. 

if i had 1 billion i would invest everything into this masterpiece,please continue


can u tell me why u making this this game with unity not other engine?

sorry btw

Why not

it wont let me downloaded it

Stuck on the beach on Chapter 3. Says I have more to do before going to the lake, but I have already gathered all the food for Ara. Help?

Have u ever seen the slime?u should trigger this event before going to the lake

Good afternoon. If it's not a secret, then with what help did you make the graphics in the game? (Do you have any lessons on this program?). I also want to create my own game, but I can not draw. 

They are made from scratch; first concept art, then blender and zbrush, then hand drawn textures.

Hello, been having issues with Steam account, unable to contact anyone, any help? TY

Don't think this is the right place to ask about your steam acc?


Can I ask when it will be Finished?

I really liked the Prologue.

Keep up the good work. :)

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I been avoiding this game for a bit and I can't remeber the fist time i seen this. The last thing I remeber was the cat lady (neko), slime girl, and a bee of some kind. I don't know where or what the "cannon release date" is but right now I am trying out this game in 1/8/2020 and currently 19 of age. I been hearing a lot of possitive talk about this game with my weired internet furry friends and I finally chose this day to try the game out. I didn't expect a charater to be close to around the same age as me, that is if the "release date" is around Jun 20, 2019. Ara the neko would be older then me by a few mouths (that's if we are not including to dates in game), close tho. I'm still not sure if Jun 20, 2019 would be considered the cannon release date. I fill like this was created much sooner then that. Anyways, besides that I haven't gotten far in the game but it seems really amazing. I'm taking a college class on 3D moddling and seeing how clean this game plays is blowing my mind. This is the first 3D envirnment game that didn't make my pc drop frams. Even the characters look amazing and clear. I wouldn't mind following this project though and see how well it turns out. Hope the hard work is being payed off like it should because this looks like a gem for sure.


Really wish I could download and try out this game, but sadly it doesn't support macs :/


thank yu Redamz, just thank yu. I fucking love this game, cant wait for more !
And im late but happy new year to you, wish you all the best for you and of course, for your game ! Thank yu again, im waiting like a kid in christmass for more :P 

hello everyone, I'm having a issue with mystery girl scene, the option "voice acting" is active, and  for some reason I can't hear her voice at all, I think maybe it could be the default app that open the DVRdata files on: MGI_data / StreamingAssets / dearVR / data... or a issue with the plugins.

could anyone help me pls



This game is beautiful, please keep up the good updates!! I am looking forward to the full release!! :)

I wonder why the port for linux is no longer present in this version of the game... it would be cool if MGI was exported to linux again.


I like your game because it has sex, but u should add more sex in it.

Viewing most recent comments 8 to 47 of 100 · Next page · Last page