Subnautica 2 Best Tadpole Upgrades — Modules & Recipes

Requirements

All modules crafted at Modification Station

Requirement	Details
Modification Station	Titanium x2, Celestine x2, Copper x2
Module blueprint	Scan datacards in the world

How to Install

1. Craft module at Modification Station
2. Swim to Tadpole top, interact with upgrade panel
3. Drag module from inventory to Upgrades Panel

4 upgrade slots. Stackable modules occupy separate slots.

Past 250m without Depth Module, hull takes continuous damage.

Best Upgrade Modules

Depth Module Mk.1

Most important upgrade — 450m depth

Recipe
Celestine x3, Enameled Glass x2, System Chip x1

Engine Efficiency

Reduces power use 20% per module (stacks x4)

Recipe
Titanium Ingot x1, Glass x2, System Chip x1

Strike Armor

Reduces incoming physical damage

Recipe
Enameled Glass x2, Strontium x2

Cavitation Muffler

Reduces noise to avoid attracting predators

Recipe
Titanium x3, Strontium x2

Photovoltaic Charger

Charges Tadpole in shallow water during daytime.

Recipe
Copper Ingot x1, Strong Acid x1, Troilite x1

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	Dedicated Core x2, Troilite x2, Mangalloy Ingot x2 (Creative only)

Best setup: 2x Engine Efficiency + 1x Strike Armor + 1x Depth Module Mk.1

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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.