
MODIFICATION APP

MODIFICATION APP
is a 18+ transformation-focused erotic visual novel game in development!
Synopsis
You are given access to a brand new MODIFICATION APP on your phone. A shady developer tells you that you can use it to modify your roommate any way you see fit - and even more she's into it? What will you be able to do? How far will you be able to go? Only way to know is to dive in and start MODIFYING!
About
The project has been in my mind for a long time, as a game I always wanted to exist. A game mostly focused on fun transformations and the fun events that come from those scenarios.
Credits
Game by: Tightly - https://x.com/tightly_dev
Mia VA: Mieraleeeem - https://x.com/mieraleeeem
Support the Project
If you too want to see this project continued, get early access, exclusive WIPs and vote on what will be implemented next, you can support it on Patreon or SubscribeStar!!
Because of itchio's bot problem, any comments with links will be automatically deleted.
Either way, don't click random links in the comments claiming to be "updates"
| Updated | 2 days ago |
| Status | In development |
| Platforms | HTML5, Windows, macOS |
| Rating | Rated 4.6 out of 5 stars (964 total ratings) |
| Author | tightly |
| Genre | Visual Novel |
| Made with | Aseprite, Godot, Clip Studio Paint |
| Tags | 2D, Adult, breast-expansion, corruption, giantess, Hentai, mind-control, Monster Girls, NSFW, transformation |
| Average session | A few minutes |
| Content | No generative AI was used |
Development log
- Birthday Q&A2 days ago
- 0.9.1 - Locale Bugfix7 days ago
- 0.9.0 - Goth12 days ago
- 0.8.1 - Bug fixes48 days ago
- 0.8.0 - Growth+51 days ago
- 0.7.0 - Milk83 days ago
- 0.6.0 - PetDec 28, 2025











Comments
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Android plzz
crash report: consistently crashes on the Goth 2 make-up peek cutscene. Unable to progress further. I’ve opened up some debug and the other window but it just seems like videos/objects are real heavy. For the web version. Great game keep it up!
so here's a question, are there any kinks you aren't interested in putting into the game?
feet...
First, i hope i get android version, second, i cant pass the part where you play the bat minigame because it crashes right after the last minigame, i experience crashes frecuently, especially in the final goth scene, i think its because the browser cant support that many things in the screen?
Android version and my life is yours
Any plans for an Android version? I'm really interested, but i only have Android
WHY ISNT IT ANDROID...no matter love her voice btw and the drag in her voice too and i have computer anyway so ill just play it on there no further problems
Any plans on a futa or femboy transformation? Also great game and amazing voice acting!
as i remember they making a voting on Patreon for nexy transformation, so not big chance for some not traditional transformatio.
futa is on my list of possible future MODIFICATIONS!!
I see. thank you for answering my question.
Halo, ran into a crash on macOS on v0.9.1, ~15 min in. segfault in the main loop, GDScript calling
.size()on what looks like a null Array during a_processtick.stack bottoms out at
Array::size()→ innerGDScriptFunction::call→Object::_notification_forward(process notification) →SceneTree::_process_group. so it's a per-frame script doingsomething.size()without a null check.probably worth grepping your
_processfuncs for.size()calls on arrays that get cleared/reassigned. cheap fix isif arr: arr.size()or default to[]instead ofnull.thank you for reporting!
when did the crash happen? during a specific minigame, during a dialogue (if so, which path/event was happening at the time), or just normal wandering around?
the game crashed on me, again for the 37 time, I have counted. In the browser version so it makes sense it would crash. No hard feelings.
What are you playing on (desktop, android, iphone), and what happens?
Does any error show up or does it just close?
The game crashes for me too - every time on day 45 while playing in the browser on Android smartphone.
if you save the game on day 44, and wait to day 45 does it still crash? Or does only crash when doing some specific path/minigame/etc.
also what happens with the crash?
does it freeze the browser, does the browser refresh, does an error message show up in-game?
from my experience its whenever certain “cutscenes” are playing. A large majority of the time they can crash the game.
Thanks for the convenience features of being able to reset, having a path diagram built into the game, and having the ability to skip scenes that we've already seen. But even though I can skip the scene that follows it, I still have to play the minigames each time, which makes exploring the full set of paths a bit tedious.
I don't know how feasible it is in the code, but it would be nice if we could directly reset back to any point along a path, rather than only back to the very beginning. Or at the very least skip any minigame that we've already done.
I think the reason is that it would make this less of a game or less fun overall
It's fucking amazing ! the goth and growth path is incredible ! Never stop updating this game
i love this so much please never stop updating it
yoo i have been playing for the past little bit and i utterly adore it!
although this may be a selfish request but would it be a problem if you guys added a gender swap route? Be it through an item in the store, or some kind of regular change that leads to her finding the app and changing you, flipping the dynamic leading to different minigames and male versions of the other tfs that were in the female version?
Like for example the pet route you now have 3 options you could make her a pet in her regular form, becoming the pet for the male one, or make the male one your pet.
I know this a whole bunch of scope creep but I really feel like it would be a fun thing to have in a game that is majority transformations.
thank you for reading friend, can't wait to see what you make of this game!
Plsss add a weight gain route
maybe add more to the paths that already exist
Wow this is such a good game, although I feel like something missing *cough cough pregnancy route. hmmm ( Add it and my life is yours)
Ngl, cow and tall roommate are peak. absolute PEAK. I'd like to add more, but all I can say is that I had a great time and it made me smile like an idiot sometimes. 20/10.
do you have somthing special planned for 1.0 or just another path?
Next update will not be 1.0.0, it will be 0.10.0.
I use game version numbers like this:
X.Y.Z
Y is the major version (the update number)
Z is the minor version (for bug fixes and small improvements)
X is the "milestone" version. Will only be changed if some big game milestone is met, like having finished adding all paths to the game, or something of that magnitude.
Will there be a apk version?
great game, but i cannot for the life of me understand why the mall is a place you can go when i haven't seen anything i can do to use it
Currently, the mall is only used for the Goth path (and a minor dialogue interaction on Bimbo 2).
Will have more content in the future.
I cannot, for the life of me, find the third level of bimbofication. Am I dumbass ? If yes, pls help. If it is a problem with the game, pls fix. Thank you for anyone who answers
living room, afternoon, play videogames to wait for Mia to return.
AWESOME game, seriously, one of the best on this website. Also, is the current web version like just the demo, do we have to pay for the full game or are you doing charity work? additionally, will this come to steam? and one last question, can we ask for specific transformations... stuff? and if yes, where?
Thank you for the nice words!!
The game is currently in development and is made possible by my supporters on Patreon and Subscribestar, where they get early access, behind the scenes, and the ability to vote on what gets implemented next!
there might be a steam version once the game is completed, but it's still way too early for that.
I don't take transformation requests/commissions, but I have a discord server for my supporters where they can share stuff, and if I like it, I might consider it for the future.
is the discord only for supporters
and if not where could i find it ?
the discord server is currently supporter exclusive
ok thanks for answering
When will the Android version be released?
You can play on android rn
Yes, but what I'm getting at is when are they going to release an Android version for download?
add weight gain and my life is yours...
not a friend but a brother
I really hope there will be a mobile version of this game at some point but even with a mobile version it’s still great
very nice and i wonder if you got somthing big planned for 1.0 or would it be alot of polishing the old things like voicelines for general chatting or mabye going back to discovered modifications to save time also my save now has 60 days
is the junky for other people?
as for some reason the maps and the minigames arent working correctly
hey, sorry to hear that.
if you can provide some more specifics like
1. What problems are you facing
2. What are you running the game on (windows, mac, web desktop, web android, web ios)
i might be able to help.
Well firstly i was running windows but also had that problem in web desktop and web android.
And the issue itself is that that app on the phone are mostly unusable as like you can see in the pics the app are junked and cant use them that issue makes some of the modifiactions imposbole such as goth,milking and bimbo. And of course the map for exmple the mall cant be used, and also the tree
MODIFICATIONS are locked to specific time/places.
Goth is in the morning kitchen; Milk and Bimbo are in the afternoon living room.
If the issue isn't that and there's a bug, if you can't add the images here, feel free to DM me on twitter @tightly_dev (if you DM me there, please comment here to let me know you did so, so I remember to check).
Hey i sent you a dm under the username tadara
What won 0.10 poll? Also what were the other options?
It says a lot of cake so maybe ass? Not sure tho
can we give ideas future tf's ?
and if so where ?
and in what form
just the tf or with some form of story
and are there restictions of what not to propose (i like latex)
neat
Ya me lo pasé me hice un Speedrun y dure 8:50.05 XD
Ya me lo pasé en ssolo dure 8 horas☺️ de terminar el juego pero está bueno el juego me gustó la parte donde se le rompe la blusa la parte divertida me hizo reír mucho😂😅, me gustaría que pusieras que se convierta en una milf o una demonio o chubby waifu o gamer o una waifu ebony o una personaje yandere 😄
Will the game have a android version?
BIG
We are eagerly awaiting the update :3
IT'S HERE!!
The game is fucking amazing, already explored all the modifications and the vampire ending.
I loved the minigames and had lots of funs completing theme to complete the game. The art style has a bit of room for improvement but is still really good and unique.
I liked the milk minigames music and the BGM in general, maybe do you have a youtube channel or something where I can listen to the ost?
There was a mistake in the timing during the sex scene in the bimbo routes tho, the voiced dialogs start after the text dialog. The milk minigame had a small bug when two 1L milk bottles came at the same time and made me fail both.
I'd suggest some changes like a gallery
Anyways, loved it 9/10, surely recommend
I don't know if this is just me not being used to the site, but when I try to search for "modification app" via the site's search bar, it doesn't come up.
Otherwise I'm LOVING this game.
I'm glad you're enjoying it!!
afaik, all adult games were removed from the search bar after the payment processor apocalypse last year, so only by tags or google, unfortunately.
report i gues on expansion lvl 3 error message poping up when cutscene plays also good game 21/25 modifications done also im playing thru website
Thank you for reporting!
Can you please tell me what the error said?
Can you replicate the error every time you enter the BE lvl.3?
The texts start to slow down and then it crashes
are you playing on windows, mac or web?
if you're playing on web, are you playing on a computer, android or iphone?