Slot Extender (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
- 👍 2.4% endorsement rate — high engagement, a strong quality signal
- 🏆 #1 of 456 Gameplay mods in this game by downloads
📋 About This Mod
IMPORTANT!!
SMLHelper versions no more supported!
Steam Legacy Branch no more supported!
(older version remains available in the Files tab)
Features:
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[]SlotExtender adds two extra chip slots to the personal equipment.
[
]SlotExtender adds (max. eight) extra upgrade module slots to the Seamoth and the Prawn Suit.[]SlotExtender adds (max. eight) extra upgrade module slots to the Cyclops.
[]SlotExtender is automatically compatible with all vanilla upgrade modules and should even be compatible with all modded upgrade modules for the Chip, Seamoth, Prawn Suit and the Cyclops.
[]Torpedo Modules for the Seamoth can only be added in slots 1-4.
[]Prawn Suit storage modules limited to four!
[]Slot Extender also adds extra QuickSlots for the extra slots.
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[]Default keys:
[]'R' for Prawn storage access.
[]'T' for Vehicle upgrade access.
[]'Upgrade Slot 1-4 hotkeys' for Seamoth storage access (if there is a storage module).
[]'6,7,8,9,0,/,=' for extra module hotkeys.
[]The contents of all the upgrade slots, including the extra ones, is handled by the normal game save files.
[]Slot layout can change in configfile (Grid, Circle)
Requirements:
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[] BepInEx Subnautica Pack
[
] NautilusInstallation:
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[]You must have BepInEx Subnautica Pack and Nautilus installed.
[
]Simply extract the SlotExtender archive into your BepInEx\plugins\ folder.
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[]You must have BepInEx Subnautica Pack and Nautilus installed.
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[] BepInEx Subnautica Pack
Slot Extender 2.8 by Senna is a gameplay mod for Subnautica that expands equipment slots: it adds 2 more chip slots, allows 12 upgrade modules in the Seamoth and Prawn Suit, and 14 in the Cyclops. With over 13,000 endorsements and 563,000 downloads, it's a popular quality-of-life enhancement for players who want more customization.
✨ Key Features
📊 Pros & Cons
✅ Pros
- Huge community trust: 13,298 endorsements and 563,850 downloads show it's a go-to mod.
- Straightforward slot expansion—no complicated config, just more room for upgrades.
- Works across all three major vehicles, so you get consistent benefits no matter what you pilot.
⚠️ Cons
- Requires BepInEx and Nautilus, so you'll need to set up the modding framework first.
- Last updated August 2025—might not be compatible with future game patches, so watch for updates.
- No detailed instructions in the description, so you'll need to know how to install BepInEx mods.
For Subnautica players who love maxing out their vehicles and want to squeeze in every possible upgrade. If you're tired of choosing between depth modules and storage, this mod is for you. Skip it if you prefer vanilla balance or don't want to bother with mod loaders.
💡 Beginner Tips
- Make sure you install BepInEx first and run the game once to generate the necessary folders before adding Nautilus and this mod.
- After installing, check the in-game options or mod config files to confirm the slot counts are active—some mods require a game restart.
- If you're using other vehicle mods, test compatibility in a creative save to avoid conflicts with upgrade slots.
📊 Mod Details
- Game
- Subnautica Mods
- Author
- Senna
- Version
- 3.0
- Downloads
- 563,850
- Endorsements
- 13,298
- Category
- Gameplay
- Created
- 8/24/2018
- Updated
- 8/21/2025
🔧 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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