Subnautica 2 Pro Tips: 15 Things I Learned After 50 Hours on Proteus

After 50 hours in Subnautica 2 I've figured out a bunch of things the game does not tell you. Some of these are exploits. Some are just the result of paying too much attention to creature behavior. A few might be bugs that Unknown Worlds will patch eventually. All of them will make your life easier.

Creature Exploits

1. The Lurker's blind spot is directly above it.

The Trench Lurker scans horizontally. Its sensory organs are along the sides of its head. If you swim directly above it, about ten meters up, it won't detect you. I've hovered over a Lurker for thirty seconds waiting for it to leave a cave entrance. It swam right under me and kept going. This only works above. Not behind. Not below. Above.

2. Snapjaws target the first thing that moves.

If you're being chased by a group of Snapjaws, toss a piece of raw fish. Any fish. They'll swarm the fish instead of you. This also works with scrap metal but fish is cheaper. I keep a raw Peepers-equivalent in my inventory specifically as a Snapjaw distraction.

3. The Bloom Titan's roots have a cooldown.

After a sweep, the roots retract for four to five seconds. This is consistent. You can time it. I used a stopwatch one attempt and it was exactly 4.2 seconds between sweep end and sweep start on the return. Exploit this window to scan or to cross the area.

4. Most predators won't follow you into caves.

Cave entrances on Proteus seem to have an invisible boundary that large fauna won't cross. If something big is chasing you and there's a cave nearby, go in. The predator will circle outside. This has saved me from Lurkers at least three times.

Biomod Synergies

5. Bioluminescent Vision plus Electric Discharge creates a combo.

If you have both Biomods equipped and something attacks you, the Electric Discharge triggers. The flash of the discharge interacts with Bioluminescent Vision and briefly reveals every creature in a huge radius. It's like a free sonar ping every time you get hit. Not exactly worth getting hit for but useful information in chaotic situations.

6. Enhanced Grip Strength applies to scanning speed.

I discovered this by accident. The Biomod says it improves resource gathering. What it doesn't say is that it also speeds up fragment scanning by roughly 30%. You complete scans in about two seconds instead of three. Over hundreds of scans this saves real time.

7. Mineral Sense stacks with the Scanner Room HUD chip.

I mentioned this causes visual issues earlier and it does. But if you can handle the cluttered overlay, the combination reveals literally every resource in a biome. You will never miss a node. Turn it off when you're not actively harvesting though or you'll go cross-eyed.

Base Building Tricks

8. Thermal Plants work through terrain.

You don't need line of sight between a Thermal Plant and a heat source. If there's a vent inside a cave wall, you can place the Plant on the outside surface and it still draws power. The range is about 30 meters through solid rock. Useful for hiding your power infrastructure.

9. Moonpools repair vehicles faster than the Repair Tool.

If your Tadpole takes damage, docking it in a Moonpool repairs it to full in about 15 seconds. The Repair Tool takes maybe two minutes to do the same job. Always dock to repair if a Moonpool is available. Save the Repair Tool for field emergencies.

10. Vertical base layouts reduce navigation time.

Stack Multipurpose Rooms vertically with ladders rather than spreading horizontally. One room per function. Top floor is crafting and storage. Middle is power management and water filtration. Bottom is Moonpool access. You go up and down instead of running through corridors. My base is three rooms tall and I can reach any station in under ten seconds.

11. Growbeds outside the base are vulnerable.

If you plant Gel Sacks or Creepvine outside, predators can destroy them. I lost a fully grown Creepvine bed to a juvenile Lurker that wandered too close to my base. Build a raised platform and put growbeds on top. Most creatures don't path vertically onto platforms. Not a guarantee but it's held up so far.

Exploration Shortcuts

12. The Trench has a back entrance.

There's a second entrance to the Trench biome at roughly 350 meters on the eastern side. It's a narrow crevice between two rock formations. This entrance bypasses the Lurker that patrols the main entrance. You need the Tadpole's Scout chassis to fit through but it's doable. I found this by accident running from something and it's been my primary Trench access ever since.

13. You can use the Propulsion Pack to climb waterfalls.

Certain cave systems have waterfall-like currents that push you down. The Propulsion Pack is strong enough to override them if you hold forward and angle upward. This opens some areas earlier than intended. I've accessed deep cave systems at hour five that the game probably gates for hour ten.

14. Currents are navigational tools.

Proteus has an ocean current system. It's not just visual. Currents actually push you in certain directions in open water. Learn which direction the current flows in different biomes. The current in the Shallows flows east. In the Reef Shelf it flows north. If you're low on power, ride the current instead of fighting it. You move faster with zero power consumption.

15. The Void's edge is marked by temperature.

Your HUD displays water temperature. In every biome on Proteus it's between 15 and 30 degrees Celsius. When you approach the Void, it drops. Rapidly. At about five degrees your HUD starts glitching. At zero you're in the Void proper. Use temperature as an early warning. If it drops below ten degrees and you're not deliberately going to the Void, turn around immediately.