Subnautica 2’s first big content drop in early access is here. Called Adaptive Measures, the Early Access 1.1 update is live now on PC and Xbox, and it arrives less than two months after the game launched into early access. Rather than a story expansion, this is a broad quality-of-life pass that reworks the Biomod system, expands where you can unlock those Biomods, adjusts how creatures behave, and cleans up base building.
Quick answer: Install Adaptive Measures (Early Access 1.1) on PC or Xbox to get two new Biolabs, six unlockable Biomods, extra passive Biomod slots from scanning, revised creature and Bloom Parasite behavior, and base-building fixes. You do not need to start a new save.
Biomod changes and two new Biolabs
The Biomod system is the centerpiece of Adaptive Measures. Early-game Biomod progression has been smoothed out so you run into the system sooner and have more chances to use it. Two new Biolabs have also been added, one in Coral Gardens and one in Axum Ruins, which raises the total number of Biolabs from four to six.
Scanning now plays a bigger role too. You can unlock extra passive Biomod slots by scanning creatures with the Bioscanner, and the interface shows how many scans each slot needs alongside your current Bioscan total. If you play in Creative mode, every Biomod is now unlocked by default.
| Biomod change | Effect |
|---|---|
| Early-game progression | Smoothed so you discover and use Biomods sooner |
| Unlockable Biomods | Raised from four to six from Biolabs |
| New Biolab locations | Coral Gardens and Axum Ruins |
| Passive slot unlocks | Earned by scanning creatures with the Bioscanner |
| Scan tracking | Shows scans required per slot and your total Bioscans |
| Creative mode | All Biomods unlocked by default |
How creatures and plants now react to you
Subnautica 2 leans on a non-lethal survival approach, and Adaptive Measures makes predator encounters feel more predictable. Most creatures now flee properly when you hit them with the Survival Multitool, and they will not retaliate afterward except to defend themselves for a short window. The Sonic Resonator adds a brief dizzy state on most creatures, with the same defensive-only period afterward.
The Bloom Parasite got a rework as well. Its behavior implementation was improved, and it is now the main encounter creature for the Bloom. The Bloom itself was rebalanced in the Coral Gardens and Ruins areas so it lines up better with where you are in progression.
- Particle fish grouping improved when swimming in schools.
- Added the missing scan data icon for the Periscopic Clowncrab.
- Added the missing scan data icon for the Necrolei.
- Revised the Creature Naming and Discovery System to match the previous game.
Base-building fixes in Adaptive Measures
The procedural base-building system also got a round of practical fixes. The maximum deconstruct size of bases went up, and placement feedback is clearer when the build area is blocked or docking is not possible. Placement ghosts are now easier to read when they sit behind objects or intersect the water surface.
The Vehicle Dock and Fabricator were reworked to fit smaller rooms and align with hatches and other base parts, and the Vehicle Dock platform and rails are smaller so they take up less space. New feedback messages tell you when the Moonpool needs to be enlarged for vehicle fabrication or docking. There is also a new storage base buildable that does not feed nearby crafting systems, so items you store there can be excluded from recipe completion.
Where to get the update and read the full notes
Adaptive Measures is available now on PC and Xbox. Because it is delivered as a standard game update, you get the changes the next time your platform installs the patch, and your existing save carries over. The development team has confirmed that new content is being added without requiring players to restart their saves.
Alongside the headline features, Adaptive Measures includes a large batch of bug fixes typical of an early access build. You can read every line item in the complete patch notes on the Adaptive Measures update page. This is the first of the larger improvement updates Unknown Worlds outlined for early access, with a multiplayer-focused 1.2 update planned to follow.
