Modded Arms Helper (BepInEx - Nautilus)
🟠 Updated over a year agoThis mod may not work until the author updates it. Check for an update, or see the rollback guide.
⚠️ Install Order · 4 steps
Install in this order, then this mod last — most mods fail to load without their framework and dependencies in place.
Preview
🔍 Analysis
- 👍 1.3% endorsement rate — high engagement, a strong quality signal
- 🏆 #7 of 36 Libraries mods in this game by downloads
📋 About This Mod
IMPORTANT!!
SMLHelper versions no more supported!
Steam Legacy Branch not Supported!
Features:
-
[]Special abstract class for arms: CraftableModdedArm via SMLHelper. V2. Assets. ModPrefab class.
[
]Special abstract class for arm fragments: SpawnableArmFragment via SMLHelper. V2. Assets. ModPrefab class.[]New arm Interface for Seamoth arms handling: ISeamothArm
[]Exosuit arms can be operated by implementing the game's original interface.
[]ArmServices singleton class for arm registration and many helper methods.
[]Internal basic handlers for all vanilla arms.
[]Built-in XML documentation.
Using a custom arm model:
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[]The lower arm part of the arms can be replaced with a custom arm model.
[]The custom lower arm model pivot point must be set to the elbow.
Requirements:
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[]BepInEx Subnautica Pack
[]Nautilus
[]Slot Extender (BepInEx - Nautilus)
Useful help for modders on my github repo: github
-
[]APIBasedExosuitArms is a complete source code for all Exosuit vanilla arm implementations on my github repository.
[
]PlasmaCannonArm is a complete source code how to work with custom arm model.[]SeamothArms is a complete source code for all vanilla arm implementations on my github repository.
[]To get started, reference the dll file ModdedArmsHelper.dll to your project.
[]The dll located in your Subnautica\BepInEx\plugins\ModdedArmsHelper directory.
Installation:
- []You must have BepInEx Subnautica Pack and Nautilus installed.
- Simply extract the ModdedArmsHelper archive into your BepInEx\plugins\ folder.
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[]APIBasedExosuitArms is a complete source code for all Exosuit vanilla arm implementations on my github repository.
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[]BepInEx Subnautica Pack
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[]The lower arm part of the arms can be replaced with a custom arm model.
Modded Arms Helper is a BepInEx-Nautilus library that provides an API for modders to add new arms to the Seamoth and Exosuit in Subnautica. It simplifies the process of creating custom arms, making it a foundational tool for mod development. With 1,772 endorsements and 138,374 downloads, it's a well-established resource in the community.
✨ Key Features
📊 Pros & Cons
✅ Pros
- Huge community trust with 1,772 endorsements and 138k downloads.
- Actively maintained—last updated August 2025, so it's current.
- Essential for any modder wanting to add custom arms without reinventing the wheel.
⚠️ Cons
- Not for players—it's a dev tool, so if you're not modding, skip it.
- Requires BepInEx and Nautilus, so you need to set up those dependencies first.
- No documentation or examples provided in the description, so you'll need to dig into the code.
For Subnautica modders who want to create custom arms for Seamoth and Exosuit. If you're a player looking for new arms, this isn't for you—you'll need mods that use this API. Skip if you're not into mod development.
💡 Beginner Tips
- Make sure you have BepInEx and Nautilus installed before adding this helper, as it depends on them.
- If you're a modder, check the mod's source code on GitHub for usage examples since the description lacks details.
- For players, this mod won't do anything on its own—look for mods that require it as a dependency.
📊 Mod Details
- Game
- Subnautica Mods
- Author
- Senna
- Version
- 1.6
- Downloads
- 138,374
- Endorsements
- 1,772
- Category
- Libraries
- Created
- 1/12/2023
- Updated
- 8/21/2025
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