Undertale/Deltarune NSFW mods?

[Sunshine Recorder]

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Here's some amateur nude sprites I did of Alphys from DELTARUNE

 

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[jotaro-]

On 11/13/2025 at 8:17 PM, Buddussy said:

It's gonna be really exciting when we get some legit sex in here at some point, the hyper mod got close but it was still just the intro.

I was waiting for Sextale. It had some interesting animations and hot monster designs

[SoggyRune]

I've done some walk cycles + a bg replacement for the save file select image and some other misc stuff. minor hyper warning

 

Spoiler

 

 

 

 

 

[Anon69310]

34 minutes ago, SoggyRune said:

I've done some walk cycles + a bg replacement for the save file select image and some other misc stuff. minor hyper warning

 

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Kind've hope Ralsei will still be a boy in this. Also Catty looks great.

[SoggyRune]

9 hours ago, Anon69310 said:

Kind've hope Ralsei will still be a boy in this. Also Catty looks great.

 

Yeah Ralsei is just a femboy, not genderbending him.

[Sunshine Recorder]

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Here's some amateur nude sprites I did of Jockington and some other Hometown NPCs

 

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[iweieufnuiwnfiuqnsedufniwn]

On 10/14/2025 at 11:47 AM, Sunshine Recorder said:

 

Here's a WIP build of my amateur nude mod for DELTARUNE Chapter 1. You should be able to patch the xdelta file just fine. If not, please let me know.

 

Also, for @losstie27 and @none named user, your names are credited in the CREDITS.txt file, and in the in-game credits of the mod. I haven't added your sprites in yet, but I will in future builds.

I keep having a problem when i try to patch it when following the directions in the README and I'm not sure what the problem is or how to fix it. I tried to get around it by not do a checksum validation, but that ended up not working either. Anyone have an idea on how to fix this? Thank you in advance.

[Sunshine Recorder]

10 hours ago, iweieufnuiwnfiuqnsedufniwn said:

I keep having a problem when i try to patch it when following the directions in the README and I'm not sure what the problem is or how to fix it. I tried to get around it by not do a checksum validation, but that ended up not working either. Anyone have an idea on how to fix this? Thank you in advance.

 

So from what I've gathered, the XD3_INVALID_INPUT error happens when you try a patch an already patched/modified data.win file, or if you try to patch an incompatible version of a game. Make sure that your DELTARUNE Chapter 1 data.win file is not modified before you patch it. You should also make sure that Chapter 1 has v1.40, and that you patch the correct data.win file from the chapter1_windows folder since there are separate data.win files for each chapter and the chapter select.

 

 

[jjjayman95]

Stumbled upon this long ass goldmine a few minutes ago, and I’m deciding to help.

 

ive gathered as many Noelle AND Susie nsfw sprites, and compiled them into two big ass sheets, one for Susie, one for Noelle

, there might be more to come, just so you all know.

 

Here is Susie 

 

[jjjayman95]

And here is Noelle

 

[jjjayman95]

I literally made an account here just to post this stuff and to see other things that come along, XD

[iweieufnuiwnfiuqnsedufniwn]

On 11/30/2025 at 8:40 AM, Sunshine Recorder said:

 

So from what I've gathered, the XD3_INVALID_INPUT error happens when you try a patch an already patched/modified data.win file, or if you try to patch an incompatible version of a game. Make sure that your DELTARUNE Chapter 1 data.win file is not modified before you patch it. You should also make sure that Chapter 1 has v1.40, and that you patch the correct data.win file from the chapter1_windows folder since there are separate data.win files for each chapter and the chapter select.

 

 

It worked, thank you! :3

[Schvorb]

On 11/24/2025 at 8:30 PM, SoggyRune said:

I've done some walk cycles + a bg replacement for the save file select image and some other misc stuff. minor hyper warning

 

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I’ve been hypnotized for a while just watching that busty bouncy Noelle. Is there any chance you might release her sprites by themselves for a replacement when they’re finished?

[SoggyRune]

On 12/2/2025 at 3:23 PM, Schvorb said:

I’ve been hypnotized for a while just watching that busty bouncy Noelle. Is there any chance you might release her sprites by themselves for a replacement when they’re finished?

 

I'm in the process of trying to make a full au mod, hopefully I'll have something playable soon, cutscenes are hard.

 

I could release a bunch of images for use with the modding tool import graphics option if you want, but you'd have to manually adjust the origins because the images aren't the same size.

[Penissex2008]

Here's some Frisk sprites I made over the course of around 5 hours. They aren't the best thing ever but I think I did well enough regardless. I pretty much just edited a sprite sheet I found on the internet.

[whateverdontcare]

2 hours ago, Penissex2008 said:

Here's some Frisk sprites I made over the course of around 5 hours. They aren't the best thing ever but I think I did well enough regardless. I pretty much just edited a sprite sheet I found on the internet.

Are those peeing sprites near the bottom??? What are those for??

[Sunshine Recorder]

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Here's some amateur nude sprites I did of Pizzapants from DELTARUNE Chapter 1

 

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Edited December 4, 2025 by Sunshine Recorder

[Schvorb]

On 12/3/2025 at 5:01 PM, SoggyRune said:

 

I'm in the process of trying to make a full au mod, hopefully I'll have something playable soon, cutscenes are hard.

 

I could release a bunch of images for use with the modding tool import graphics option if you want, but you'd have to manually adjust the origins because the images aren't the same size.

I’d have to teach myself how to do all that, but sure, it would be incredible to have the sprites if you feel comfortable sharing them!

[Penissex2008]

16 hours ago, whateverdontcare said:

Are those peeing sprites near the bottom??? What are those for??

Those were an experiment that went nowhere.

[SoggyRune]

Here's some stuff I did recently for my au mod.

 

animated erections for Kris ingame

 

Lewd redesign of the bigmouth nurse at the hospital

 

 

A preview of what sex scenes could look like ingame, and an animated version of the closeup itself.

 

 

A cutscene bug lol

 

[Sunshine Recorder]

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Here's some amateur nude sprites I did of Blue Ears and Purple Guy from DELTARUNE

 

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Edited December 13, 2025 by Sunshine Recorder

[Sunshine Recorder]

Just updated my nude mod of DELTARUNE Chapter 1, this update mostly adds nude sprites of Hometown residents and Seam, and allows you to change the gender of MK in the Dark World menu.

[Elnina_number_1_simp]

Here's a very bad carol nude edit sprite, but, i actually really liked the result, so im planning to do ALL of her sprites

Spoiler

 

 

Edited December 19, 2025 by noelleholiday_number1_simp

[tails47]

I thought about throwing my hat in the ring and tried making breasts for noelle in CH1. Added "physics" afterword because it looked stiff. I'll try her CH2 darkworld sprites later after a break, let me know what you guys think of it (good and bad).

 

 

[thatoneweirdo8691]

is there any downloadable mods now? if so could i get a link (regarding deltarune)