A downloadable game for Windows, macOS, and Linux

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My Strange Sis is complete now!

This is story about a guy who ran away from his family in order to study in a different city. However, the real reason he ran away from home is that he was fleeing his sister, for whom he has carnal feelings. While it may seem like this is just another B/S incest-themed story, it's not "just another incest game." Instead, our game's storyline is set in a modern urban fantasy setting. The narrative takes center-stage in this game. How well you manage your relationship with your sister is pretty tightly coupled to this setting. It's pretty difficult to separate the two. Additionally, the game's plot offers diverse choice. Currently, there are already fifteen significant variations in terms of the evolution of the narrative that can occur in the game. We are expecting to have at least five different "good" or "canonical" endings, not including the bad ones. So, in a single playthrough, you won't even see half the content that has been created.

We are also animating the interactive erotic scenes, making them not only interactive, but also animated. There are currently two such scenes in the game. These scenes are not the ones narrated purely through text.

Although there will only be one female protagonist in the game, she is customizable among three personalities. These customizations will influence how she responds and reacts to the different scenarios you two encounter, as well as her clothing, and even the events that you can trigger with her.

Her customization will also extend to her appearance via customizing her hair, skin, eyes, etc.

The main adult content are:

- B/S incest

- M/F

- some TF themes

- sleeping, voyeur, and other stuff that you can expect from incest game.

You can download a next version on Patreon:


Our blog is:



Download NowName your own price

Click download now to get access to the following files:

My_Strange_Sis_v1.0a-linux.tar.bz2 201 MB
My_Strange_Sis_v1.0a-mac.zip 200 MB
My_Strange_Sis_v1.0a-win.zip 201 MB
My_Strange_Sis_v1.0a-PP-linux.tar.bz2 208 MB
if you pay $10 USD or more
My_Strange_Sis_v1.0a-PP-mac.zip 207 MB
if you pay $10 USD or more
My_Strange_Sis_v1.0a-PP-win.zip 208 MB
if you pay $10 USD or more

Development log

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(1 edit)

does paying for the latest version entitle free copies of the next version to come out on this site? or will that have to be paid for aswel?

I'm not sure how this works on itch.io. But I suspect that this is access to only one file.

update: idk if the games been updated since i payed for it or not (doesn't really matter) or if itchio has changed something but it seems my questions answer is yes paying for a game entitles free downloads of future versions which is a great

The game is fully complete for now.

Just played 0.43, enjoyable reads once again! Makes me regret I can't pay for the latest update on itch.io :< Thanks for your efforts!

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Hi! Thank you! And thank you for you bugreport.

Nice! Would love to have a 'slutty' personality with less issue to get laid but more difficulty to romantically bond with. May need to involve denying certain advances that come from her side, doing it love rather than lust or the other way around.

Also really like the fact we can customize our sister and decide whether she's blood related or not.

By the way a question: Will you add a payable version of the latest uncensored demo's here on itch.io? I'd rather not make an account on Patreon as well just so I can enjoy an extended demo. Itch.io allows easy and anonymous payments. Those that paid for it once can re-download a new alpha version without paying again, until the full version comes out. ;)


We will thinking about add a new personalities, but only after we complete the game. About payment version... Well, we have some problems with PayPal. So Patreon is only option now, sorry.

Thanks for the quick reply! Would love to donate to this game, I like the little mini-games and how your choices change the outcome. Do you have an estimated quarter of a year that your team is working on for completion?

Can't wait till those unfortunate issues with PayPal have been restored, I'll follow this itch.io page till completion!

We will finish "My Strange Sis" this summer. Perhaps there will be other updates after that. With a new customization or personalities.

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No, it will be free )

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Great game! I like how this game allows players to customize the girl's looks and her relationship to you (related by blood or marriage). I also like the mini-game where you must open the bathroom door slowly to spy on your sister in the shower. Looking forward to the final version!


Hi! We are glad that you are liked our game. This version have another sex event, i'm suppose that you can't find it yet.


Cool ... I'll have to uncover it. Keep up the good work!


Now this is a good idea. I love the fact you customize the girl too in this one.