Mass Changer Menu

v1.0.0·Updated 2026-08-16

A BepInEx mod that adds an in-game GUI menu with a slider to configure object mass. Make things feather-light or super heavy! Press P to open.

About this mod Author’s original text

Mass Changer Menu

A fun and customizable BepInEx mod for Human: Fall Flat that allows you to change the mass of all objects in the level with the click of a button!

Features

  • Customizable Mass: Use the in-game slider to set the target mass anywhere from 0.1 kg to 100 kg. Make objects light as a feather or incredibly heavy!
  • Config Auto-Save: Your selected mass is automatically saved to a.cfg file in the BepInEx config folder.
  • In-Game GUI: Easy-to-use window menu triggered by a hotkey.
  • Smart Target: Ignores players (you and your friends won't fly into space).
  • Memory System: Instantly restores all objects to their original, natural mass when you click the restore button.

How to use

  • Load into a level (works best if you are the host).
  • Press P on your keyboard to open the Mod Menu.
  • Move the Slider to choose your desired object weight.
  • Click "Apply Mass" to apply the new weight to all objects.
  • Click "Restore Normal Mass" whenever you want to return things to normal.

Installation

  • Install BepInEx for Human: Fall Flat.
  • Download the mod and extract the.dll file into your BepInEx/plugins folder.
  • Launch the game and enjoy!

Install & use Install: follow the bundled instructions

  1. Unzip the archive from playbuff and read the bundled readme / instructions first.
  2. Most mods rely on the game's mod loader — the usual route is a community mod manager (such as r2modman): pick this game, install, and it handles the loader and dependencies.
  3. For a manual install, put the mod files into the matching Mod / plugins folder inside the game directory.
  4. Launch the game to confirm it loaded; mods with listed dependencies need those installed as well.

Install locations vary a lot between mods — the bundled readme is the most reliable guide.

File & checksum

Filename
Mass_Changer_Menu-1.0.0.zip
File size
96.4 KiB