Subnautica 2 Tadpole Upgrades: All Modules and Costs

The 3 steps to an upgraded Tadpole

1. 1

   Step 1

   Build a Modification Station

   • It is a Habitat Builder piece.
   • Recipe: 2 Titanium, 2 Celestine, 2 Copper, 8 seconds.
   • The game says it will "Create upgrades for your vehicles and more".
2. 2

   Step 2

   Craft the modules

   • Each module is one craft at the station:

   Module	Ingredients	What the game says
   Tadpole Depth Module Mk. 1	3 Celestine, 2 Enameled Glass, 1 System Chip	Structural health monitoring allows the Tadpole to dive deeper before structural damage. Multiple modules do not stack.
   Tadpole Depth Module Mk. 2	2 Dedicated Core, 2 Troilite, 2 Mangalloy Ingot	Adaptive alloys counteract hull pressure, allowing the Tadpole to dive even deeper before structural damage. Multiple modules do not stack.
   Strike Armor	2 Enameled Glass, 2 Strontium	Added strike plates greatly reduce incoming physical damage from attacks or collisions.
   Engine Efficiency	1 Titanium Ingot, 2 Glass, 1 System Chip	Optimizes engine function in real time to reduce power use by 20%. Stacks up to four times (max 80%).
   Cavitation Muffler	3 Titanium, 2 Strontium	Reduces the noise of the Tadpole, making it less likely to attract unwanted attention.
   Photovoltaic Charger	1 Copper Ingot, 1 Strong Acid, 1 Troilite	Charges the Tadpole's power cell in shallow waters during the day.

3. 3

   Step 3

   Craft a chassis

   • Chassis are made at the Vehicle Fabricator, not the Modification Station:

   Chassis	Ingredients	Craft time	What the game says
   Tadpole Haul Chassis	4 Titanium Ingot, 3 Strontium, 3 Enameled Glass, 1 Dedicated Core	3 s	Dockable passenger and cargo chassis for the Tadpole.
   Scout Ray Chassis	2 Plasteel Ingot, 1 Advanced Wiring Kit, 1 Dedicated Core, 1 Strong Acid	3 s	Enhanced agility and speed chassis, dockable via Tadpole. Maximizes acceleration, top speed, and turn rate.

Common mistakes

• Stacking two depth modules. The text says they do not stack.
• Crafting a chassis at the Modification Station. It is a Vehicle Fabricator recipe.
• Looking for Echo Location. It is unpublished in this build. Data from the game files, build 0.10.0 (May 2026); later patches may differ.