Modification App is an adult visual novel with sandbox elements, made by tightly in Godot and presented in 2D animated style. You play a male protagonist who receives a phone application from a shady developer. The app lets you alter your roommate, who is a monster girl, through transformation and mind-control themes. Scenes are reached by using the app and completing minigames or meeting event conditions.
Development is ongoing with v0.12.3 released on October 1, 2026 for Windows and Mac in English, uncensored. This build adds five Shrink-path modifications, plus the Cute Plan mini events, Big Pants, and Size Matters events, along with the Free Fall minigame. It also updates the Godot engine version and the phone RESET button. The changelog lists several living room, kitchen, and bedroom scenarios tied to these new additions.
Developer's description
MODIFICATION APP is a 18+ transformation-focused erotic visual novel game in development!
You are given access to a brand new MODIFICATION APP on your phone. A shady developer tells you that using it you can 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!
v0.12.3
NEW MODIFICATIONS
- 5 new MODIFICATIONS for the Shrink path.
Shrink 1
- Living Room, Afternoon - Lose the Growth Lv.1 minigame 3 times. Once this event is finished, the MODIFICATION becomes available from the BreastExpansion Lv.1 state, without needing to lose again.
Shrink 2
- Living Room, Afternoon
Shrink 3
- Living Room, Afternoon
Shrink 4
- Living Room, Afternoon
Shrink 5
- Living Room, Afternoon
NEW MINI EVENT
- Cute Plan #1
Kitchen, Morning - After Shrink 3
NEW MINI EVENT
- Cute Plan #2
Living Room, Afternoon - After Cute Plan #1
NEW EVENT
- Throat Swabbing
Bedroom - After Cute Plan #2
NEW MINI EVENT
- Big Pants
Automatically after Shrink 4
NEW EVENT
- Size Matters
Automatically after Shrink 5
NEW MINIGAME
- Free Fall
Update Godot Engine version.
Update phone "RESET" button to be a press and hold.
Make Teleport minigame for BE easier.
BE Teleport minigame now automatically ends if enough correct sequences were selected.
Create Atlas trimmed asset, which should reduce the VRAM usage.
Create a bunch of miscellaneous animations scripts.
Update most UI buttons to be more responsive.
Update Mia MODIFICATION States data and add new fields.
Modify Resolution picker logic. Should now work without need to reload the game.
Fix some skips for already seen scenes causing errors.
Fix paths holder splitters not working outside root.
Fix blur background sometimes not working.
Fix broken paths after character system update
Fix missing effects after character system update
Add error exceptions so it doesn't always open debug window
Remove shader causing "Size Matters" event to lag
Add
"Alt+Enter"
shortcut to switch between fullscreen and window
Add IOS web warning to explain that you should save often
Fix last sexy scene on Milk path having issues because of the godot engine update
Fix trimmed atlas textures not being centered correctly in polygons2d
Added fix for certain GPUs not being able to render skeleton2d
Changed Tightly store unlocked requirements. Now, if the player has completed 2 paths and no event is currently happening, when moving between rooms, they will unlock the store. They don't need to reset to the Default state first.
Add black base to the Big Pants mini event, in case the lag causes the camera to not move fast enough
Fix low-rez textures using incorrect sprites
Fix typos - Big thanks to Cleavage Romeo for reviewing it.
v0.11.2
NEW NIGHT EVENT
- Boobjob Kiss
After Breast Expansion Lv.3, visit Mia's room at night
NEW NIGHT EVENT
- Bouncing Missionary
After Breast Expansion Lv.3, visit Mia's room at night
NEW MINI EVENT
- BE Dream
After finishing the Breast Expansion path, sleeping while Mia is in her default state will play this automatically.
NEW LOCATION
- Owlracle Cafe
Allows player to purchase hints.
After unlocking the GIMMICK store, there's a 80% chance a flyer will appear in the kitchen. Interacting with it will unlock the cafe.
NEW CHARACTER
- Violet
Works as a barista in the Cafe.
NEW MINI EVENT
- Meeting Violet
Visit the Cafe for the first time.
NEW ITEM
- iNanum Gaming System
Bought in the GIMMICK Store. Use it to earn TP.
NEW MINI EVENT
- Setting up the Console
Started automatically once iNanum Gaming System is bought.
NEW MINIGAME
- Pet Sweeper
NEW MINIGAME
- Sexy Slides
NEW FEATURE
- Mia Backseating
When playing the gaming console, if Mia is in the same room, she might give commentary (and very rarely, some help).
Certain paths have unique dialogues (mainly Bimbo and Goth).
NEW FEATURE
- Low-Resolution mode
On the Main Menu, this setting makes the game run with all textures at half resolution. This should improve framerate and avoid visual bugs on lower-end devices.
Create Android Build.
Make the phone larger on Android devices, so it's easier to click.
Make bat minigame not use shadows when playing on lower-end mobile devices.
Create random chance utilities to allow for random events.
Update Growth Dream event to also have a 30% chance of happening when sleeping.
Show tooltip in bottom left corner of Paths app, if player has bought the Teleporter.
Customize Godot engine to allow for multi-resolution textures
Change all preloads to loads, so that the hot-switch of textures works.
Fix inventory not being synced with GameData when purchasing an item, which caused the Teleporter to not work unless the save was reloaded.
Fix Mia's gift menu showing all items instead of only the giftable items.
Add Pet number to Pet Sweeper minigame.
Add border to Sexy Slides to make it easier to match.
Add gradient to Sexy Slides pictures to make it easier to match and avoid equal tiles.
Add "Update Available" notification when opening the game.
Fix boobjob accident of BE Lv.3 not showing scene graphics.
Fix emoji font being corrupted and causing other letters to show up with the hearts.
Fix typo on backseating Pet expression, causing missing texture.
Fix typos - Big thanks to Cleavage Romeo for reviewing it.
v0.10.0
NEW MODIFICATIONS
- 4 new MODIFICATIONS for the Ass Expansion path.
Ass Expansion 1
- Kitchen, Morning -
Lose the Breast Expansion Lv.1 minigame 3 times.
Once this event is finished, the MODIFICATION becomes available from the Default state, without needing to lose again.
Ass Expansion 2
- Kitchen, Morning
Ass Expansion 3
- Kitchen, Morning
Ass Expansion 4
- Kitchen, Morning
NEW MINI EVENT
- Mall Visit
Kitchen, Morning - After Ass Expansion 3
NEW EVENT
- Sitting Reward
Automatically after Mall Visit
NEW EVENT
- Door Stuck
Automatically after Ass Expansion 4
NEW MINIGAME
- Bomb Buns
NEW ITEM
- Can now purchase the Path Teleporter from the GIMMICK Store
It allows to quickly travel between MODIFICATIONS, by playing only 1 harder version of each minigame for the selected paths.
Travels costs TP. Since currently there is no way to farm money, the values were set low.
Update every minigame (except Bat Maze) to have a hard/teleporter version, as well as additional logic required for the teleporter (like knowing how far the minigame is from being beaten)
Update Paths app to allow for splitter connections.
Update Phone to allow for unlockable and conditional paths.
Create a new system to keep track of the changes that each MODIFICATION does, since before it was done by the events themselves.
Create Back Mia sprite character.
Create a dynamic Character Window effect.
Create a custom polygon effect for small visual enhancements during events.
Allow for multiple characters to say the same line at the same time
Fix dragging of the Paths app for touch screens.
Fix blush effect being rendered above Mia's eyes.
Fix no effects being stackable on the normal background.
Remove test and reference assets from previous updates that were left in the game
Fix Supporter List not being synced with the credits supporter list
Lock game to 60fps to fix minigames being too fast and impossible to beat
Give an additional 50 seconds to all stages of Bomb Buns
Fix Bimbo-3 night visit blur effect, making everything invisible
Fix the MODIFICATION counter on Paths app giving an incorrect sum.
Fix New Game not clearing data when loading a save, returning to main menu and creating a new game.
Fix the inventory button appearing on Tutorial
Fix typos - Big thanks to Cleavage Romeo for reviewing it.
v0.9.4
N/A
v0.8.1
On lower-end devices playing web version, make lights visible on bat minigame
Add frame wait when using a effect if still hasn't finished loading it, to avoid returning a null value on lower-end/slower devices.
On milking minigame, make milking sound stop playing when closing minigame
V0.8.0
Create Sexy Interaction menu.
NEW SEXY INTERACTION - Growth Kiss
After Growth-5, Mia's bedroom, Night.
NEW SEXY INTERACTION - Growth Side
After Growth-5, Mia's bedroom, Night.
ADD TALK EVENTS - Growth path
Growth 1 - 1 new dialogue
Growth 2 - 1 new dialogue
Growth 3 - 1 new dialogue
Growth 4 - 2 new dialogues (before and after breakfast event)
Growth 5 - 2 new dialogues
ADD STORY EVENT
After Growth-5 has been seen, with Mia in the default state, go to bed.
UPDATE GROWTH MINIGAME
All levels of growth minigame have been re-balanced to make it faster.
CREATE MAP
Note: Locations are still not implemented. Only the map itself and the system was implemented this update
Create in-game error output console (togglable in settings)
Create in-game debug window (togglable in settings)
Update dialogue system to be compatible with random lines
Update dialogue system to be compatible with conditional lines
Update talk interaction system for better future updates
Process rule to update previous saves, so that save event names and in-game event ids don't differ
Add copy window when playing on web version, since unlike Windows/Mac, browsers don’t allow setting the clipboard.
Fix text id being set incorrectly if dialogue line ends with “}”.
Add settings button on Phone when playing on a mobile device.
Fix panels on bimbo minigame sometimes being half-closed.
Fix milking sound on milking minigame playing after minigame has finished.
Fix milking window not being removed when bottle was clicked too early.
Remove mouse mode when playing on web version
Make bat minigame light timing slightly bigger.
Fix light on first bat minigame not killing bat.
Don’t allow bat to be killed if minigame has already finished.
Fix typos - Big thanks to Cleavage Romeo for reviewing it.
v0.7.0
NEW MODIFICATIONS
- 4 new modifications on the Milk Path
MILK 1
- Living Room, Afternoon - Started after the Nipple Sensitivity x2 on the BE path.
MILK 2
- Living Room, Afternoon
MILK 3
- Living Room, Afternoon
MILK 4
- Living Room, Afternoon
NEW EVENT
- Milky HJ
Going to Sleep - Available after MILK 3
NEW EVENT
- Swinging Milk
Going to Sleep - Available after waiting 2+ days after MILK 4
NEW MINI EVENT
- Breakfast Bottle
Kitchen, Morning - Available after MILK 2
NEW MINI EVENT
- Night Peaking
Going to Sleep - Available after Breakfast Bottle mini event.
NEW MINIGAME
- Milk Wall
New Item
- Name Tag.
Allows Player to change name, gender and Mia's name.
Better normalization of Voice Acting audio
Add additional help tip after Mia leaves on BIMBO 2
Add tutorial panel to 1st Pet minigame
Improve performance of smoke particles during MODIFICATIONS
Fix room background blur not being reset after event is finished
Fix wake up animation removing time of day
Fix side smoke effect occupying the entire screen if too zoomed in
Fix no skip line sometimes being ignored when used with other tags.
Bake echo effect, which should solve weird popping/crackling effects on lower-end/mobile devices
Fix missing points on cow minigame
Add retry button on vampire minigame
Fix typos - Big thanks to Cleavage Romeo for reviewing it.
v0.6.0
NEW MODIFICATIONS
- 4 new modifications on the Pet Path
Pet 1
- Kitchen, Morning - Started from Mind Control 2
Pet 2
- Kitchen, Morning
Pet 3
- Kitchen, Morning
Pet 4
- Kitchen, Morning
NEW EVENT
- Pet Lick
Kitchen, Morning - Available after Pet 3
NEW EVENT
- Pet in Heat
Kitchen, Morning - Available after Pet 4
NEW MINI EVENT
- Tail Problems
Kitchen, Morning - Available after Pet 2
NEW MINIGAME
- Giving the Paw
Add Voice Acting for Vampire and Pet paths
Change rendering driver to "Compatibility mode" and fix issues.
Create experimental web release.
Compress Voice Acting audio files.
Fix dialogue character movement being cancelled mid-way when spamming forward.
Fix wrong name references on DialogueManager when using external dialogue files.
Optimize emoji font and audio files for smaller build size.
Add small easter egg when setting Mia's name to "Miera".
Fix typos - Big thanks to Cleavage Romeo for reviewing it.
v0.4.1
Fix typos
General dialogue improvement on all branches
v0.4.0
NEW MODIFICATIONS
- 5 new modifications on the Growth Path
Growth 1
- Living Room, Afternoon - Started from BreastExpansion 1
Growth 2
- Living Room, Afternoon
Growth 3
- Living Room, Afternoon
Growth 4
- Living Room, Afternoon
Growth 5
- Living Room, Afternoon
NEW EVENT
- Breast Smother
Kitchen, Morning - Available after Growth 4
NEW EVENT
- Pickup BJ
Triggered automatically at the end of Growth 5
NEW MINIGAME
- Growing Tower
Can now hide text box with "H"
Create complex animation system for dialogue manager
Improve smoke effect to reduce lag on lower-spec machines
Fix bug where you could spam skip un-skippable dialogue
A LOT of internal code / development tool changes.
Fix typos
v0.3.0
NEW MODIFICATIONS
- 4 new modifications on the Bimbo Path
Bimbofication 1
- Living Room, Afternoon - Started from
BreastExpansion 4
Bimbofication 2
- Living Room, Afternoon
Bimbofication 3
- Living Room, Afternoon
Bimbofication 4
- Living Room, Afternoon
NEW EVENT
- Mia's New Outfit
Living Room, Afternoon - Available after Bimbofication 2
NEW EVENT
- Bimbo Night Visit
Triggered by going to sleep - Available after Bimbofication 3
NEW EVENT
- Bimbo Doggy
Triggered automatically at the end of Bimbofication 4
NEW MINIGAME
- Wet the Bimbos
Create "CompatibilityLauncher.bat" to automatically start game with OpenGL3, for players who cannot run Vulkan
Complete re-haul of the saving system (old saves are not compatible)
Saves now have minimum version requirement
Saves now keep track of seen Modifications
Saves now keep track of seen Events
Saves now keep track of persistent Specials
Create Paths App, to allow the player to view what has been unlocked (and what's left)
Create simple Settings menu - Fullscreen option, SFX and Music Volume
Add quit option to main menu
Add option to skip already seen scenes
Create mandatory events logic
Add pronoun option when starting the game (currently only affects like 3 lines of dialogue on MindControl path. Let me know if I missed any.)
Create persistent specials for long events
Create custom cursors
Allow multiple of the same effect during dialogues
Fix issue that the game would slightly freeze whenever a immediate tween was created
Fix typos
v0.2.0
NEW MODIFICATIONS
- 4 new modifications on the Mind Control path
Mind Control 1
- Living Room, Afternoon
Mind Control 2
- Living Room, Afternoon
Mind Control 3
- Living Room, Afternoon
Mind Control 4
- Living Room, Afternoon
NEW EVENT
- Hypno Kiss
Triggered automatically at the end of Mind Control 2
NEW EVENT
- Hypno Blowjob
Triggered automatically at the end of Mind Control 4
NEW MINIGAME
- Hypno Pendulum
Can now move forward text with Spacebar or Z
Added a graphic to show Mia is in the current room
Added credits and supporter screen
Changed a few lines on intro
Improve Mia's shader to allow transparency and modulation
Allow multiple of the same character on stage
Fix thoughts sometimes not making background darker
Fix Mia not wanting to leave the room during dialogue
Fix dialogue box size calculation to ignore tags
Fix typos
v0.1.0
NEW MODIFICATIONS -
4 new modifications on the
Breast Expansion
path
BreastExpansion 1
- Kitchen Morning.
BreastExpansion 2
- Kitchen Morning.
Nipple Sensitivity x2
- Kitchen Morning.
BreastExpansion 3
- Kitchen Morning.
NEW EVENT -
Accidental Boobjob
Triggered automatically at the end of
Breast Expansion 3
NEW MINIGAME
Boob Says
Talk option during the day. Still without much variety
Improve audio transitions
Add various VFXs and a more dynamic camera during scenes to make everything feel a bit less static
Re-drew a lot of Mia's expressions
Add text input when creating a new game for the player to be able to change their name, and Mia's name
Fix dialogue box being too small for certain texts
Correct typos
v0.0.0
NEW EVENT
- Tutorial / Introduction to the game
NEW MINIGAME
- Setup minigame
Mia artwork and expressions
Implement visual novel systems in Godot
Implement minigame system
Implement character system
Implement various other systems (TweenManager, AudioManager, etc etc, boring technical stuff)
Player reviews
Player rating5.0 / 5 · 20 ratings
Written reviews20 · avg 4.7★
Positive (4–5★)100%
Latest review2026-03-31
What players say
Mostly positive reviews praise art, voice acting, fun minigames, and branching paths, with early content complaints.
5★14
4★6
3★0
2★0
1★0
Players like
Distinctive art style and animation
Fun minigames tied to modification routes
Branching transformation paths with varied kinks
Voice acting adds appeal
Common complaints
Exploring branches requires replaying minigames from the start
Current content feels short and early in development
Replaying scenes or reverting progress is inconvenient
Best for players who enjoy transformation kinks, branching paths, and playful minigames.
Summarised from 20 written player reviews.
rytherkid2026-03-31★★★★★
Very good hope to see future updates with more paths and maybe more interactions outside of just the effects of the app. Your art is great love the style, good balance of simplicity and detail. cant wait to see more…
Every1sGrudge2026-03-13★★★★★
Rev @ Modification App [v0.8.0] Art's fine, no complaints. Writing is thin, but in a not-in-the-way sort of style rather than an incomprehensible-mess style. No complaints. Well, I say that but I like the implication that the roomie is into…
Deleted member 106491782026-03-07★★★★★
+ Cool art style + FULLY VOICE ACTED (HELLO???) + Branching Paths + Minigames that are actually FUN TO PLAY and don't feel like a waste of time??? This is a winner Yall better give this some love I don't…