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RPG Maker MV
Release Date
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Orig PC Gender
Adult Themes
TF Themes

Version: 0.4.2

Version: 0.3.1

Version: 0.2.4

Version: 0.2.3

Version: 0.2.2

Version: 0.1.3

The Proteus Effect
by Proxxie


The Proteus Effect is a game for adults that combines lighthearted comedy, engaging characters and story, lively dialogue, and gripping challenges with distinctive, vivid art and alluring erotic scenes to create a fun, sexy, and ultimately unique experience.

You take on the role of Alex, a lovable but dimwitted young man who barely graduated college and is now desperately searching for a job. Just in the nick of time, he stumbles into the job of his dreams as a video game tester for a virtual reality startup, but all isn’t as it seems. After being introduced to his eccentric coworkers, he soon finds himself not only trapped in the virtual world, but also stuck in the body of a nubile young woman.

All Alex wants is to return home to his own body, but he winds up reluctantly embarking on an adventure through a series of fantasy worlds, including the company’s game world, another world that’s suspiciously similar to a popular MMO, and an assortment of others. 

He isn’t alone, though - shortly into the journey he is joined by his co-worker Ana, a tough, slightly abrasive, yet kindhearted young woman. Alex isn’t the only one who’s changed in the virtual world; it looks like Ana ended up with a little something… extra?

 Eventually, Alex is joined by other quirky companions, and together they try to uncover what’s behind the system’s strange malfunctions. How does he keep getting sent to these bizarre places? What connects them all? Can he ever manage to find his way back home?

This is a game for adults, so there’s plenty of erotic content. This isn’t just mindless porn, however - the scenes are sometimes titillatingly erotic, sometimes hilarious, but always interesting and fun. The game currently has content for futanari fans, and there will be plenty of scenes for people who like ‘group activities’, monsters, tentacles, vanilla (gasp!), and many other fetishes. The erotic scenes are completely optional - you can avoid any scenes you don’t like, and if you just want to experience the game’s entertainment without any of the porn, you can do that too!

If you’re looking for a fun, entertaining, and sexy game with likable characters, laughs, and distinctive art, The Proteus Effect might just be your game. So go ahead, give the public version a try! It’s only one major release behind the patron version, and it’s free! And if you really enjoy the game - and I think you will - please consider supporting the project by becoming a patron. 


Note: The download links in the sidebar are for Windows. For public macOS and Linux releases, please see my Patreon page.


Current Patron version: 0.5

0.5 Changelog:

2 new H-scenes, one of which has 2 distinct variations

5 new quests

New skits

A (hopefully!) fun event at the end!

A bunch of new characters

Lots of new dialogue

2 new areas and 2 new building interiors


Version 0.4 is now available to the public!

0.4 Changelog:

New city

3 new quests (But it's really like a single long one)

3 new H-scenes with 50+ renders

Lots of new dialogue



Second dungeon should be less frustrating to players having problems with it.

HCG image quality slightly enhanced

Download size greatly reduced

Path to upper level in chincha area now more clearly marked

NUM 0 should now escape, for those playing with the number keys (hopefully, couldn’t test)

Various minor bugfixes


Added visual effects to healing minigame

Resolved issue that could trap players in the old adventurers' house

Resolved issue that could send players to level that shouldn't be in game

Saves are again located in save folder rather than local app data folder

Resolved issue that could cause healing minigame to restart after winning it

Resolved player character's strange fear of butterflies

Player can no longer move (and potentially softlock game) during dungeon cutscene

Resolved issue that could prevent some players from re-entering first dungeon

Resolved issue that could cause game to request nonexistent assets

Various minor bugfixes


Fixed crashes in the healing minigame and dungeon cutscene


Can no longer enter Celie & Elian's house before completing quest

Quest journal should show up as normal



New content:

New starter area

New dungeon

2 new H-scenes (one of which is 13 images)

Various quests

Various other areas

Lots of dialogue


Gameplay enhancements:

Added intro skip feature

Can now hide text boxes during H-scenes (press 'h' for hide)

Revised equipment and equipment screen

Player character sprite now changes according to outfit

Probably a bunch of other stuff I forgot



Resolved issue that could interfere with scripted scenes in dungeon

Resolved issue that could trap player in barn

Various minor fixes

Added Patreon link




Reduced some enemies' HP

Latest Reviews - View All Reviews

Review by ddongssanda

Version reviewed: 0.4.2 on 06/12/2018

Funny. Definitely funny. This game can be regarded as a comedy. It is so funny that it might be a mood breaker if you want some serious erotic fantasy, but other than that, it's wonderful.


It still feels a bit short. On the other hand, if you are lost, it may feel painfully long. Walkthrough may be helpful (personally, it happened to me at the cookie stage).


I'm waiting for the progress!

Review by CelticMoonShine

Version reviewed: 0.4.2 on 05/14/2018

This is one of my favorites on this site. A lot of people have done virtual world adventures, but instead of the common "Welcome to the World, time to change you" (which is fun dont get me wrong) this is different, way funnier and over all better written. Theres development into the character side by side with some fantastic sex scenes.

8/10 cause Im waiting till its done

Review by tenant

Version reviewed: 0.4.2 on 05/06/2018

Easily one of the most fun and polished games here. The character development is interesting, the anti-objectification messages are appreciated, and the writing is funny. I was genuinely disappointed when the current content ended!

Review by quiverclaw

Version reviewed: 0.4.2 on 04/27/2018

Have to say, this is one of my favorite games on the site.  I liked it enough to support it on Patreon anyway... 

For an RPGMaker game, the combat isn't overdone and there's no grinding required. So that's a big bonus given the platform.  

The use of 3D Renders for cutscenes and avatars is becoming pretty prevalent but the author's style is nice and unique.  It blends quality with cartoony/anime style in a visually appealing way.  Including great use of facial expressions to add humor and context to the text throughout the game.  There's a few solid hours of play here if you go after everything there is to do.  Make sure and check your quest log and talk to EVERYONE to see it all.  You may have to save-scum to get to some of it because different choices lead to different paths.  


This should be obvious given this site, but most of the content seems to be in what I'd call the "acceptance path", make the pervy or girly choices to see it.  That's nothing new for games on this site though. 

All in all a fav and one I surely download every new release as soon as they become available.



Review by Grimdog

Version reviewed: 0.4.2 on 04/26/2018

This game is good so far and the music is vary soothing.

The problem I hide before was from being stupid; but I got past it.

Thank you


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