ECC Library 2.0 (for BepInEx)
🟡 Updated this yearThis mod was updated after the recent game update — it should work on the current version. (Subnautica Security Hotfix)
⚠️ Install Order · 3 steps
Install in this order, then this mod last — most mods fail to load without their framework and dependencies in place.
Preview
🔍 Analysis
- 👍 0.8% endorsement rate
- ✅ Updated 228 days after the latest game patch — actively maintained
- 🏆 #4 of 36 Libraries mods in this game by downloads
📋 About This Mod
ECC Library
2. 0
GitHub | Example creature code | Version for Below ZeroECC Library is a modding library for Subnautica 2. 0 (and Below Zero) that is built on Nautilus. This library handles and simplifies the creation of modded creatures. As compared to the original ECC Library, this version uses Nautilus and makes the creature creation process much easier with less clutter.Installation (Automatic)
You can use the Mod Manager to automatically install mods. If you decide to use it, simply place the downloaded file into the ModDownloads folder and press Install in the in-game mod menu.
You can also use Vortex to automatically install this mod.
Installation (Manual)
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[]If you haven’t already, download and install the Subnautica BepInEx Pack.
[
]Download the latest version of this mod.[]Place the downloaded zip file into your Subnautica\BepInEx folder.
[]Right click the zip file and select extract --> unzip here (NOT "Extract all").
If you can’t find that button, you can instead open the zip file, copy
the "plugins" folder, and paste it into the BepInEx folder.
Requires Nautilus!
ECC Library 2.0 is a dependency library for Subnautica creature mods, required for all such mods to function. It has high endorsements and downloads, indicating widespread use. Last updated in May 2026, it supports the latest game version.
✨ Key Features
📊 Pros & Cons
✅ Pros
- Essential for creature mods – you'll need this for almost any new creature.
- Huge download count (453k) means it's battle-tested by the community.
- Actively maintained (updated May 2026) – works with the latest Subnautica.
⚠️ Cons
- Does nothing on its own – it's a library, not a content mod.
- Requires BepInEx setup, which might be extra work if you're new to modding.
- No standalone features – you'll need to find creature mods that depend on it.
For Subnautica modders who want to install creature mods – this is a must-have dependency. If you're just looking for new content, you'll need to pair it with actual creature mods. Skip if you don't plan on adding creatures.
💡 Beginner Tips
- Make sure BepInEx is installed first – ECC Library won't work without it.
- Place the DLL in the BepInEx/plugins folder, not the game's root directory.
- Check that your Subnautica version matches the library's requirements – it's built for the latest version.
📊 Mod Details
- Game
- Subnautica Mods
- Author
- Kallie23
- Version
- 2.2.3
- Downloads
- 453,875
- Endorsements
- 3,685
- Category
- Libraries
- Created
- 1/1/2024
- Updated
- 5/20/2026
🧩 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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