Lakatrazz-Fusion icon


A multiplayer mod for BONELAB, taking advantage of its physical interaction.

Last updated a month ago
Total downloads 128525
Total rating 50 
Categories Code Mods
Dependency string Lakatrazz-Fusion-1.5.1
Dependants 13 other mods depend on this mod

This mod requires the following mods to function

gnonme-BoneLib-2.2.1 icon

A BONELAB mod for making life easier for other mod creators.

Preferred version: 2.2.1



Having been in development for 5 months, the long awaited multiplayer mod FUSION for BONELAB is here.


How To Install (PCVR)

  1. Make sure you are on BONELAB Patch 3. This is the "public beta" branch.
  2. Install MelonLoader (0.5.7 required).
  3. Install BoneLib.
  4. Download Fusion and drag the LabFusion.dll file into your MelonLoader Mods folder. This is not to be confused with the SLZ official mods folder.
  5. Drag the LabFusionUpdater.dll file into your MelonLoader Plugins folder. This will automatically update the mod for you.
  6. Make sure you have Steam installed and running.
  7. You're done!

How To Install (Quest)

  1. Make sure you are on BONELAB Patch 3. This is the "public beta" branch.
  2. Install LemonLoader (latest version required).
  3. Install BoneLib.
  4. Download Fusion and drag the LabFusion.dll file into your Mods folder. Ignore the LabFusionUpdater.dll file, it does not work on Quest.
  5. Download FusionHelper on your PC (available here). This will wirelessly connect to your Quest.
    • Note that the PC does not need to run BONELAB, or have good specifications.
  6. Run Steam and FusionHelper on your PC.
    • Make sure to run these programs every time you play, and that your PC and Quest are on the same network.
    • Both programs are required as they handle networking the game between you and your friends.
  7. Open BONELAB on your Quest.
  8. You're done!

Video Tutorials


How to Use the Mod

All of the functions of the mod can be found in BONEMENU under the tab "BONELAB Fusion". In order to make and join servers, use the Matchmaking tab. Starting or disconnecting from a server can be found in the "Server Info" tab.

Physical Interactions

Instead of players and synced props being kinematic, non-physics objects, all interactions are solved using physical forces.
This means you can pick up your friends, throw them, stand on them, push them, and more.

Campaign Support

The entire campaign has been ensured completable, with nearly every custom event synced, as well as optimizations made to make the experience run as smoothly as possible.

Supported Platforms

  • SteamVR
  • Oculus PCVR
  • Oculus Quest

Crossplay Support

All platforms are able to crossplay together. In order to do so, you simply have to select the same "Networking Layer" in BONEMENU and restart the game. The option is under BONELAB Fusion -> Network Layer Manager -> Target Layer. Note that some layers may be unsupported on some platforms.

Additional Content

Modules, Gamemodes, and the Bitmart

Fusion has integrated support to allow other mods to implement Fusion compatibility using "Modules". There is an SDK for Unity, allowing you to implement features while in multiplayer, as well as a code SDK in order to create unique synced features. You can find both of these here.

Besides that, Fusion also has integrated gamemodes. The current gamemodes are:

  • Deathmatch, Free-for-all fighting!
  • Team Deathmatch, Kill as many players on the opposite team!
  • Entangled, Be constrained to a randomized partner!

Custom maps can implement these gamemodes, and customize them specifically for their map.

Finally, Fusion has built in cosmetics. Winning gamemodes will earn you Bits to use at the Bitmart. Here, you are able to equip/unequip as well as purchase items such as cosmetics. Other players will be able to see these cosmetics, and you can mix and match as you choose.


As an additional way to earn Bits, you can accomplish various tasks to complete Achievements. There are a large amount of Achievements, each with differing challenge, risk, and reward. Upon completing every achievement, you may even unlock some secret items!



You can view the most recent changes and credits in the in game info box in VoidG114.



You can listen to the Fusion official soundtrack here:



Launch Trailer

Available versions

Please note that the install buttons only work if you have compatible client software installed, such as the Thunderstore Mod Manager. Otherwise use the zip download links instead.

Upload date Version number Downloads Download link  
2023-10-30 1.5.1 12226 Version 1.5.1 Install
2023-9-2 1.5.0 34879 Version 1.5.0 Install
2023-5-25 1.4.1 32770 Version 1.4.1 Install
2023-5-25 1.4.0 463 Version 1.4.0 Install
2023-4-23 1.3.2 8032 Version 1.3.2 Install
2023-4-23 1.3.1 386 Version 1.3.1 Install
2023-3-23 1.3.0 14969 Version 1.3.0 Install
2023-3-18 1.2.1 7261 Version 1.2.1 Install
2023-3-18 1.2.0 509 Version 1.2.0 Install
2023-3-15 1.1.1 8014 Version 1.1.1 Install
2023-3-15 1.1.0 979 Version 1.1.0 Install
2023-3-14 1.0.1 4791 Version 1.0.1 Install
2023-3-14 1.0.0 3246 Version 1.0.0 Install