QModManager 4 (Legacy)
⚪ Last updated 2022⚠️ Install Order · 2 steps
Install in this order, then this mod last — most mods fail to load without their framework and dependencies in place.
Preview
🔍 Analysis
- 👍 2.1% endorsement rate — high engagement, a strong quality signal
- 🏆 #2 of 90 Utilities mods in this game by downloads
📋 About This Mod
QModManager has been deprecated and is now only for the steam Legacy branch of Subnautica!!!!!!
If you are receiving a Bad Image Format exception, please verify your game files and try installing QModManager again.
If you are having trouble installing any mod or QModManager, please refer to our discord server.
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QModManager Installation
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[]Download the latest version.[/]
[]Locate your game directory. This varies across systems but some commonly used paths are listed below:
Steam: C:\Program Files (x86)\Steam\steamapps\common\Subnautica
Epic Games: C:\Program Files\Epic Games\Subnautica[/]
[]Extract the contents of the zip file into your Subnautica directory. You can do this by opening the file and dragging the contents out into your game folder. Alternatively, you can copy the files within and paste them into your game folder.[/]
[]If done correctly, there should be a BepInEx folder directly inside your game directory.[/]
[]Run the game once. A QMods folder should be created, and this is where you can place all of your legacy mods.[/]
Installation for Steam Deck (Linux)
Refer to the guide in our GitHub here.
Uninstalling QModManager
Delete the Bepinex folder from your Game Directory.
How to install mods for QModManager
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[]Download the mod. If it is for legacy, it should contain a folder, in which there should be a file called "mod.json" and some .dll file. There may also be some other files.[/]
[]Put that folder into your QMods folder, located in the Subnautica install directory[/]
[]Run the game from the Steam Library (or other game store library)
Creating a mod for QModManager:
It is recommended that you visit our Discord server (linked above), visit the modding-resources channel, and ask any questions you have.
https://github.com/QModManager/QModManager/blob/master/README.md
https://github.com/SubnauticaModding/QModManager/wiki
Source code located at https://github.com/QModManager/QModManager
Try it with QMod SAM
QMod SAM. An easy-to-
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[]Download the mod. If it is for legacy, it should contain a folder, in which there should be a file called "mod.json" and some .dll file. There may also be some other files.[/]
QModManager 4 (Legacy) is a discontinued mod loader for Subnautica, now only compatible with the Steam Legacy Branch after the game's 2.0 update. With 32,520 endorsements and 1.6 million downloads, it was the standard tool for installing mods, but its discontinuation means users must switch to newer alternatives for current versions.
✨ Key Features
📊 Pros & Cons
✅ Pros
- Massive community trust — 32,520 endorsements and 1.6 million downloads show it was the go-to mod loader.
- Essential for legacy players who want to keep using older mods on the Steam Legacy Branch.
- Simple to use — drop-in installation and automatic mod detection made it beginner-friendly.
⚠️ Cons
- Discontinued — no updates since October 2022, so it won't work with Subnautica 2.0+.
- Only for the Steam Legacy Branch, which is a separate game version that most players won't have.
- No longer supported by the modding community — new mods are built for QModManager 5 or BepInEx, so you're stuck with old mods.
For Subnautica players who deliberately stay on the Steam Legacy Branch and want to keep using classic mods. Skip if you're on the current version — you'll need a different mod loader.
💡 Beginner Tips
- Make sure you've opted into the Steam Legacy Branch in your game properties, or QModManager won't load.
- Check that your mods are compatible with QModManager 4 — many older mods may require specific versions.
- If you're on Subnautica 2.0+, uninstall this and look for QModManager 5 or BepInEx instead.
📊 Mod Details
- Game
- Subnautica Mods
- Author
- Subnautica modding organization
- Version
- 4.4.4
- Downloads
- 1,575,911
- Endorsements
- 32,520
- Category
- Utilities
- Created
- 2/13/2019
- Updated
- 10/31/2022
🧩 Commonly Used Together
Users add these mods to the same collections — a real compatibility signal, not an AI guess.
🔧 How to Install Subnautica Mods
Download from Nexus.
📖 Full step-by-step install guide for Subnautica →
Visit the official mod page for specific installation instructions for this mod.
🎮 Need cheat codes or console commands? Check ur gaming wiki for Subnautica commands, item IDs, and more.
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