Slot Extender Zero (BepInEx - Nautilus)
⚪ Last updated 2023Preview

🔍 Analysis
- 👍 2.7% endorsement rate — high engagement, a strong quality signal
- 🏆 #1 of 24 Vehicles and Upgrades mods in this game by downloads
📋 About This Mod
IMPORTANT!!
QModManager - SMLHelper versions no more supported!
Features:
-
[]SlotExtenderZero adds (max. eight) extra upgrade module slots to the Prawn Suit and the Seatruck.
[
]SlotExtenderZero also add two arm slot to the Seatruck.[]SlotExtenderZero also add two extra chip slots to the Player.
[]SlotExtenderZero also add three upgrade module slots to the Hoverbike.
[]This mod is automatically compatible with all vanilla upgrade modules and should even be compatible with all modded upgrade modules for the Prawn Suit and the Seatruck.
[]Prawn Suit storage modules limited to four!
[]SlotExtenderZero also adds extra QuickSlots for the extra slots.
[]SlotExtenderZero also has an API for SeaTruck modders: SeaTruckServices; SeaTuckHelper and SeaTruckTelemetry classes.
-
[]Default keys:
[
]'R' for Prawn storage access.[]'T' for Vehicle upgrade access.
[]'Upgrade Slot 1-12 hotkeys' for Seatruck 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.
[]Can change the slot layout to Circle and Grid (in mod configfile).
Requirements:
-
[]Tobey's BepInEx Pack for Subnautica Below Zero
[]Nautilus BZ
Installation:
-
[]You must have Tobey's BepInEx Pack for Subnautica Below Zero and Nautilus BZ installed.
[]Simply extract the SlotExtenderZero archive into your BepInEx\plugins\ folder.
IMPORTANT!
MaxSlots change process:
-
[]remove all upgrade modules from all vehicles and save your game.
[]in Main Menu Mods page change max slots to desired value (5 to 12).
[]Quit to desktop.
- reload the game.
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[]remove all upgrade modules from all vehicles and save your game.
-
[]You must have Tobey's BepInEx Pack for Subnautica Below Zero and Nautilus BZ installed.
-
[]Tobey's BepInEx Pack for Subnautica Below Zero
Slot Extender Zero lets you use 12 upgrade modules simultaneously in the Prawn Suit and Seatruck. A simple quality-of-life tweak for Subnautica: Below Zero players tired of swapping upgrades. Strong community backing (3,989 endorsements, 145,693 downloads).
✨ Key Features
📊 Pros & Cons
✅ Pros
- Massive community approval: 3,989 endorsements and 145,693 downloads — this mod is a staple.
- No-nonsense upgrade limit increase: just plug in 12 modules and go.
- Covers both main vehicles, so no separate mods needed.
⚠️ Cons
- Dependencies (BepInEx, Nautilus) are only hinted in mod title, not explained.
- Last updated December 2023 — no ongoing support or compatibility notes for future game updates.
For Subnautica: Below Zero players who want to max out their Prawn Suit and Seatruck with every upgrade at once. Ideal if you're tired of choosing between depth, storage, and defense modules. Skip if you prefer vanilla constraints or need detailed setup help.
💡 Beginner Tips
- Install BepInEx and Nautilus first, then place this mod inside your BepInEx/plugins folder.
- Launch the game and open a Prawn Suit or Seatruck upgrade panel to verify 12 slots are active.
- If the mod fails, double-check that Nautilus is present and updated — this mod depends on it.
📊 Mod Details
- Game
- Subnauticabelowzero Mods
- Author
- Senna
- Version
- 2.0
- Downloads
- 145,693
- Endorsements
- 3,989
- Category
- Vehicles and Upgrades
- Created
- 8/4/2020
- Updated
- 12/30/2023
🔧 How to Install Subnautica: Below Zero Mods
Download from Nexus Mods.
📖 Full step-by-step install guide for Subnautica: Below Zero →
Visit the official mod page for specific installation instructions for this mod.
🎮 Need cheat codes or console commands? Check ur gaming wiki for Subnautica: Below Zero commands, item IDs, and more.
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