Subnautica 2 Best Tadpole Upgrade Modules Guide

Requirements

Modification Station: Titanium x2, Celestine x2, Copper x2

How to Install

1. Craft at Modification Station

2. Swim to Tadpole top, interact with Upgrade panel

3. Drag module from inventory — effect activates automatically

4 module slots. Stackable modules (Engine Efficiency) each occupy separate slots.

Best Modules

#1 Priority — Depth Module Mk.1 (450m safe depth, +200m extension)

#2 Priority — Engine Efficiency (-20% power per module, stacks 4x = 80% max)

Strike Armor — reduces incoming physical damage

Cavitation Muffler — reduces vehicle noise to avoid attracting predators

All Module Recipes

Module	Ingredients
Depth Module Mk.1	Celestine x3, Enameled Glass x2, System Chip x1
Engine Efficiency	Titanium Ingot x1, Glass x2, System Chip x1
Cavitation Muffler	Titanium x3, Strontium x2
Strike Armor	Enameled Glass x2, Strontium x2
Photovoltaic Charger	Copper Ingot x1, Strong Acid x1, Troilite x1
Depth Module Mk.2 (Creative only)	Dedicated Core x2, Troilite x2, Mangalloy Ingot x2

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The Bottom Line: The Tadpole isn’t just a vehicle — it’s your lifeline. I spent my first few hours treating it like a nice-to-have and wondering why I kept dying in deep water. Then I built one, upgraded it, and suddenly the ocean opened up. Prioritize the Depth Module. Get the Scout Chassis before you cross to the Alien Ruins. A well-equipped Tadpole is the difference between exploring and just barely surviving.