ECC Library 2.0 (for BepInEx)

subnautica — Mods & Enhancements

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.

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Downloads, ratings, compatibility info, installation guides, and user reviews.

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Syntax

Libraries

Example

Downloads: 453,875 | Endorsements: 3,685

💡 Notes

By Kallie23 | v2.2.3 | 3,685 endorsements

🎯 Tips & Tricks

Make sure BepInEx is installed first – ECC Library won't wor

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

Place the DLL in the BepInEx/plugins folder, not the game's root directory.

Check that your Subnautica version matches the library's req

Check that your Subnautica version matches the library's requirements – it's built for the latest version.

🔧 Troubleshooting

Mod not working

Check load order and required dependencies. Read the full mod description.

⚠️ Common Mistakes

Installing multiple mods that modify the same files without checking compatibility

👍 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.

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