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 88 · Next page · Last page

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.


interesting , add more feminine men and boys


It's called "Monster GIRL Island." Why would they add boys?


because then it will proove that woman are contributing to the bad hateful beahviour too based on sex and gender and that mean maybe woman should not have equal rights since men in this moment try to include woman everywhere and woman no , that sound suspicious , if woman are represented somehow then men should be represented the same , you give to the woman somethin , that somwethin must be given to men too because men too want to be feminine  , so sayng girl dont mena is about sex , the word girl dont represent the sex you have but the way they teach you to be


Its porn not a political stance. If that's your issue, you're looking at the wrong genre my friend. 


r u retarded


What they fuck, how the heck does a fantasy island full of monster girls some how turn into a arrgument about gender and wemen not having rights?! Have you not tryed the game out yet? I'm 100% sure during the start of the game that it's not just throwing a girl on you that's being a complete slut. The characters in this game seem to have backstorys and a life to them then just some random selection of girls a person wants to rape. This has nothing to do with whatever this political nonsense stance is going on about women not having rights or what ever your try to say here (your sentence needs better structure to it becasue I can barelly understand a thing your trying to say). It's litterally just a game you should try and enjoy it or at least get a good understanding of the games direction before posting a SJW/lgbtqiapk ++ rant about it.


i agree with the first comment bc i just want to fuck boys :'(


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


mucho ánimo. has hecho un gran trabajo hasta ahora, no lo abandones!


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RIP potential... 


Hi redamz, i wanted to send you a twitter message but i got a problem, but yu recive a part of my message.  Im Haze_luffy7 on twitter.

So i continue, a just wanted to say yu that i really love yur game. I discovered this game this year, and when a played i was in love. Yu have no idea how much i think yur characters is good. 

I see a lot of people criticize you For lack of updates, BUT for what i have seen in the game..  I think you put all your heart in the game, maybe yu have troubles for the game or something, or just less time for the developement of the game, idk. But people like criticize While if they are not happy, they should do a game themselves. Yur game is amazing, donc listen thoses people, yu are doing a very great game, with very hot girls.. ( in my opinion)  Even if it takes a little time, I can not wait to play the sequel, and I hope you do not give up this game, because it will be really sad .. it's my favorite adult game, the one I I took the most pleasure to discover. Your game has a lot of potential, really. So I hope I could continue this game as soon as possible, discover the next character who looks hot .. For a bit of fap .. Or a lot ..: P . That's it I finished, sorry for the long text, I just wanted to send you a message of support, since I see a lot of people being trash with you. Me too I would like the rest of the game, but it does not excuse the fact of being trash like that when you put a lot of efforts in the game!  I apologize for my english, I am from Switzerland. I hope that you will come to understand and that you will see this message. thank you for this wonderful game and please, never let this game fall, because a lot of potential as I already said. I will wait for future updates impatiently.  By then I wish you all the best in your life, and in the continuation of the game. Thank you !

( and please people, dont be trash, support him instead of criticize him.. Or do a game by yourself.. ) 


I fully agree with you and greetings from Austria


this game is actually insane.  i can tell you put your heart and soul into this. game has huuuuuge potential.

When we will have a new update ? :)


Its so buggy and broken. Not worth the effort .


Try to play it on Steam, maybe that will fix your problem. It's free btw

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i played long time ago the prologue on steam, very worth playing and no game breaking bugs

prob best hentai/erotic game yet


nO? what are you talking about

what a fucking boomer prob playing it on max settings while using a 20 yr old computer. 


Thnx mate, this game is beautiful, its lewd, its interesting to watch character interactions and those face animation is so cute and feel so real and ofcourse tell my best regards to the composer! Make please an OST section separately in Steam so I we can buy it)

I get a crash error when I try to load it, it generates a crash file but I don't know how to send that to you. I'm hoping the steam version works.


played it from begining to end on steam more time than i care to count damn good job can't wait to see the full game you can have my money ^_^


great game. I love it. technically I'm really impressed how one person could make this game. I'm trying to learn making games so I know how hard it is. GREAT job redamz!!!

Viewing most recent comments 8 to 47 of 88 · Next page · Last page