Instant Collapses

Instant Collapses Valheim Mod

Bug reports: contact@petterhansson.se

Intro

This mod makes it so that if any part of a building COMPLETELY loses connection to the terrain/ground/terrain objects, it is instantly destroyed. This alters the dynamics of the game a fair bit, and makes it more important how you build your own structures. Also having structures floating in the sky that you're trying to destroy was kinda frustrating and this mod fixes that.

Installation

Standard mod installation: you need to extract the DLL into your Valheim BepInEx plugins folder.

Limitations

Only tested in singleplayer yet. If installed by all players (client side mod), it "should" work in multiplayer as each player handles the pieces of the world they currently "own", but remains to be tested in practice.

Beware that this mod can more quickly destroy buildings in your game world, especially if there would be a bug, so maybe don't use it if you're extremely careful about your particular world.

Currently this mod does not handle cloven terrain objects. For instance, when you dig under one of those large boulders/rocks on the Plains, where logically something would happen rather than the rock floating idly in the sky.

By design, the collapse algorithm uses the regular Valheim check if a piece is connected to another, and it is very exact about it, which means that you can have the tip of a small slice of terrain or e.g. a log supporting the whole structure without problems. However, the regular Valheim structural integrity checks still happen, so the building can start collapsing logically anyway as you dig into it.

License (MIT)

Copyright (c) 2026 Petter Hansson

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Changelog

1.0.3

Fixed a bug that could cause rare collapses near unloaded zones. Fixed a performance issue.

1.0.2

Got rid of extra DLL dependency.

1.0.1

Fixed a memory leak and improved README.

1.0.0

Initial release!