The Prototype Expansion

subnautica — Mods & Enhancements

The Prototype Expansion is a story-driven vehicle mod for Subnautica that adds new precursor facilities, equipment, and expands on the Architects' lore. It lets players pilot and upgrade a highly customizable prototype vehicle. With over 1,000 endorsements and 117k downloads, it's a popular choice for lore-focused players.

📦 Full mod page on discovermods

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

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Syntax

Vehicles and Upgrades

Example

Downloads: 117,978 | Endorsements: 1,023

💡 Notes

By Prototech | v2.0.4 | 1,023 endorsements

🎯 Tips & Tricks

Back up your save before installing, as story mods can alter

Back up your save before installing, as story mods can alter world generation.

Check the mod's page for any required dependencies like QMod

Check the mod's page for any required dependencies like QMods or BepInEx — not listed here but common for Subnautica mods.

If you're new to modding, use a mod manager like Vortex to a

If you're new to modding, use a mod manager like Vortex to avoid manual file placement errors.

🔧 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

Huge community trust (1,023 endorsements) — this mod is proven.
Massive download count (117,978) shows it's widely used and tested.
Story-driven content adds real depth for Subnautica veterans.

👎 Cons

Description is cut off — unclear on exact vehicle capabilities and facility details.
No explicit compatibility notes for current Subnautica versions (last updated July 2026).
May require starting a new save to experience the story properly — not stated but typical for story mods.

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