Modification App

4.7

(43 votes)

Game Information

Developer

tightly

Version

v0.12.3

Engine

Others

Release Date

Oct 1, 2026

Last Update

Oct 10, 2026

Censorship

Uncensored

Overview

Modification App is a transformation-focused visual novel for players who want a slow, choice-driven corruption story with an erotic edge. The tone stays intimate and a little mischievous, built around one central experiment rather than a sprawling cast.

Story

A shady developer hands the protagonist a strange new phone app that can modify their roommate's body however they choose. She turns out to be more than willing to go along with it, and the app becomes the thread that pulls both of them somewhere neither fully expects.

Gameplay

Play centers on using the app to trigger physical changes in the roommate, unlocking new modifications by exploring a sandbox-style home environment and completing short in-scene events. Some changes are gated behind small minigames tied to specific rooms and times of day, encouraging players to revisit locations as new options open up. Progress is measured by how far the transformations are pushed and what new scenes that unlocks.

Features

Animated, voiced scenes paired with 2D character art
A body-modification system tied to exploration rather than a fixed storyline
Transformation and mind-control themes woven into a single evolving relationship
Monster-girl elements introduced as modifications progress further

Changelog

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.