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Game Information
Release Date
Last Update
Orig PC Gender
Adult Themes

Version: 0.2.2

Version: 0.2.1

The Sissy Girlfriend Experiment



The Sissy Girlfriend Experiment is an erotic game with erotic text and images. It also contains the following themes: Forced transformation, M2F, Femdom, Cuckold, Cumplay (optional), BSDM (optional), Sissy, Anal sex, Group sex, and oral sex. If this kind of content isn’t allowed in your country or you find it offensive, please, stop right here.

The game is still in alpha, have patience, a lot will change. If you want something less linear with more possibilities you should wait for the beta.

- Keep in mind that this is an early version and it will improve/change over the next version.
- The game will always be for free, but patrons will have access to a few more side quests, items and early access than the free version.

- If you load an old save game, it's possible you may have some problems with the code.
- See changelog for updates.

This game will always be free, but if you can, please support me. Your support will allow me to create more content and updates. If you can’t support me as a patron and you like this game, please support me by sharing it.


NOTE 01: If you want to play a stable version of the game, download the 0.2.1. The version 0.2.2 changes a lot of features, but isn't finished. Play it only if you want to test the new features (see changelog). It will only be stable on 0.2.6. You were warned.

NOTE 02: Cuckold isn't optional in this version. This will change in the future (0.3.0). If you don't feel comfortable with this content, don't play it. Once again, it's not optional in this version. You were warned.

About updates: Free updates usually will happen during the first week of the month. Follow my Tumblr to know more about it. https://sissygfexp.tumblr.com

You will start with a male character living with his sister, during a special night you met an older woman which becomes your girlfriend. Slowly, she shows her real self, but when you find out what she's up to, it may be too late.
You have a friend which you talk about your personal life, but it seems your friend may have other intentions.

Sister: She's not crazy about you.

Girlfriend: She's crazy.

Friend: She/He may have other intentions.

Doctor: You'll meet him later.


New jobs and quests: Web Designer, Housekeeper, and Personal Trainer
- Web designer: work at home, start as a blogger. You may have a promotion and do something… uh… different.
- Housekeeper: work in Mrs. Stranger’s house, an old lady with a few secrets.
- Personal Trainer: work in the gym, take a shower, help someone with the weights.
- Each time you get a promotion you’ll have to make a decision.

New features at the course
- Each job has a different course. Things to do:
- Web design: improves your jobs skill each class and mind after four classes.
- Housekeeper: do you need a course? Just help your sister at home and go work with that weird old man.
- Personal Trainer: improves your job skill each class and body after four classes.
- Bathroom: Sometimes it’s nice to take a break from everything. But don’t smoke at the bathroom.
- Dare board: You already know this one, don’t you?

New features at the gym
- Gym opens every day. Things to do:
- Workout: Improves body.
- Work: You can make money as a personal trainer (and do other things too).
- Take a shower: You have a great bathroom at home, but nothing like taking a shower in a public bathroom, right?
- Dare board: You already know this one, don’t you?

New features at the park
- You can’t work out in there anymore.
- You can meditate: improves the mind.
- You can eat a pop stickle (it may be weird if you’re horny)
- Work: Mr. Stranger lives in a house near the park, you can be his housekeeper.
- Dare board: You already know this one, don’t you?

New features at the mall/closet
- Items in the stores are now divided by groups.
- Closet: same as above. You’ll auto dress your last clothe.

New settings
- Background: Start with a small advantage in any skill you want.
- Fetish: Don’t like a specific fetish? Remove it from the game. Some haven’t been implanted yet. Some will add parts to the main story while some will add different choices. It’ll be improved it.
- New UI: Cleaner, simpler and better. Bigger images.
- Auto clothes: Remember when you needed to change clothes before doing an action? It’s auto now, but you need set it once in a while for different events or if you want to change your look.

Main quest
- 1st - 4th week: Chat was improved.
- 1st week with the GF: new option added if you want to be more dominant or submissive.
- 2nd week with the GF: if you fail to steal your sister’s panties or forget to wear it when you go visit your GF, you’ll have a nice surprise.
- 3rd week shaving: If you chat with your friend at least once during this entire time, the option to shave at his/her house is now available.
- 4th week with the GF: She’ll give you three tasks to do during the week, if you fail to do one, you’ll have a different path when visiting her. If you want to be a good slave, you should do everything she says.
- If you decide not to talk with your GF during the week, random events will happen on Sunday.
- Sister’s text is more friendly and less aggressive (1st - 4th week).
- 5th week - ???: Auto clothes were fixed for most parts, since there rest of the main quest and other side quest haven’t been re-worked yet, it’s possible there are bugs and conflict with the old code and after this part, the game may be unstable.



- New Dare board UI.
- New images and videos.

- GF and BF main story options added (3 for GF 2 for BF).
- Sister's task (every Tuesday and Thursday/more in the future).
- Dare Board: You can choose which dare to do. Reward store in the future.
- Daily money changed from 5$ to 3$.
- Patreon: Sister's party quest.
- New Mall Store.

- New store: I'll add more stores in the future with different options, I think this is an important part of the game for those who enjoy customizing their character (like me).
- BF and GF quest continues with more options and possibilities to choose from: I'm going to do a few rework on old quests. I like the idea of different actions. This makes the game replayble.



- Character's look will change with more STR.
- Character's body can change with some events and options.
- Social: this will help you see when there's an event with BF or GF available.

- GF and BF main story added (2 for GF 3 for BF and 1 with both).
- Character will lower STR by -1 (Sunday to Monday).
- Eating a candy will lower HORNY by -4 and STR by -1 (if you make your mistress mad enough, you'll be punished and you'll have to find a new way to lower your HORNY).
- Youhave to wait one day to watch porn after a Sissygasm.
- Body changes using small doses of "New SiS" three times. Ask your doctor for a free exam to check how many you have.
- Playing with a female BF will give you... hmmm... A big surprise?
- Skills were removed from random events (I'm still looking for a way to balance the skills for future events).
- Do things while watching porn will increase skills.

- Doctor office: Doctor is available on monday (if you skip it, your sister will punish you - not in a good way, it will cost $$ ).
- Doctor can improve the "New SiS" (you'll get paid for it).
- Doctor can treat the "New SiS" (it's expensive...)
- If you forget to shave before seeing your GF, you'll be punished.
- There's no more game over, but there's punishment if you skip certain events.
- Sex Shop is now available (new lingerie sets and bra)
- Makeup and makeup skills.


- Player now can check the character's stats and skills, also every time you gain points, you'll see a note about it. (except Dare Board tasks and Random Events. This will change in the next version).
- Porn points will now increase according to the amount of porn the character watches.
- Character window size increased (left menu).
- A few notes were added to help the player to know what to do next.

- Playing games and taking a shower will lower your horny state by -1. This will help players to have more control over the character's intelligence while locked. Note: Shaving will still increase your horny state by +1.
- Work out in a mindless state in the gym will increase your body stats by +1 (instead of +2). Do it in the park won't add nothing.
- Go to the course in a mindless state will increase your int stats by +1 (instead of +2). Study at home won't add nothing.
- Initial money change from 20 to 35.
- Edging watching porn will increase horny by 3 instead of 2.


- Fixed a black screen with the best friend.
- Sissy porn will increase Horny by 3 and won't lose Int anymore.


- First side quest added: the first chat with the Girlfriend, you'll see an option to know more about her past. I don't want to do any spoiler here, but in the end, you'll have two new items in your closet (unavailable in the free version).



- Fixed: Closet to mobile users: an option to show and hide the avatar was added to the closet UI.

- Fixed: Problem with the gym text showing an error.

- Fixed: Sister's text while locked won't show the erection problem anymore.



Bugs and Fixes:
- Fixed: Razor can be used 3 times before buying a new one. (The option will show up in the bathroom when the body hair has grown).
- Fixed: Shower will be available you start to stink.
- Fixed: Black screen porn. The player will be able to reach sissy porn.
(Be careful: Watching Sissy porn will increase horny +3)
- Fixed: Black screen with the GF during the first week.
- Fixed: You can choose your character’s features before adding a name.
- Fixed: Working will pay less.
- Fixed: Hard to get a game over. You will see a message about it.
- Fixed: Closet problem for Firefox users solved.
- Fixed: A LOT of grammar mistake fixed (some may still be present).
- Fixed: Panties are showing correctly during the GF’s game.
- Fixed: GF will still ask you not to masturbate, but it’s your choice now. (Unless you’re locked or during her stories).

New features:
- Added: Day counter added to the UI.
- Added: The Daring Board (computer): a new mini-game.
- Added: Text to the UI about the hair growing.

The Daring Board:
- 8 random quests.
- The option will be available if you’re mindless.
- Success varies in each quest, some depend on luck, other on your attributes.
- Quests are random, some will repeat, but some with different results and events.



- Problem with the closet while using Firefox fixed. The closet should work fine now.

Latest Reviews - View All Reviews

Review by Volendi

Version reviewed: 0.2.2 on 12/03/2018

Got all the way to the end of current content, at least on one story path... idk if there are others, but it was good!  (got to the end of the "adopted as semi-little sister" route, not telling with who...) Hoping to see more!  It sucked me in, to where I actually felt invested in the character!  Seriously, really good, with a crud-ton of potential!  =^_^=

Review by Dracornis

Version reviewed: 0.2.2 on 12/02/2018

I like what is there..

But i hope for more bdsm-pictures and features in the future :)

Review by SissyNatasha

Version reviewed: 0.2.1 on 11/08/2018

The cuckold theme isn't really for me and from what I can tell can't be avoided but this is one of the better femdom themed games, would like to see more choices to rebel/disobey but what is here is really sexy. Spelling and grammar errors increase as the game progresses. Hope the updates continue because this has huge potential

Review by sissyjan

Version reviewed: 0.2.1 on 11/02/2018

This game has come a long way from what it previously was. My criticism of it beign overhyped at the time was rather crude but I feel now the game deserves the praise that it does get and I'm gladly voicing it too. Keep up the good work.

Review by pingguo

Version reviewed: 0.2.0 on 10/24/2018

I am not use to the way the choices are presented in this game.

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Total Contests: 32
Total Reviews: 13,014
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