Quick answer
Hotfix 3 was published by Unknown Worlds on June 1, 2026. It fixes DLSS crashes and saved-setting issues, restores Frame Generation availability for some versions, upgrades DLSS to 4.5, cuts Interior Wall costs to one quarter, stops Hammerheads from attacking unpiloted Tadpoles, changes Marrowbreach and Nibbler behavior, fixes a rare start crash, fixes some multiplayer rejoin position rollback, and closes a Strike Armor stacking problem.
Field notes after Hotfix 3
PC settings guides need a fresh check
DLSS and Frame Generation are the headline items. If a launch-week guide says a graphics option is missing or unsafe, retest it after this patch.
Unpiloted Tadpoles are less risky
Hammerheads no longer attack empty Tadpoles, but the official note says they can still take an interest in them. Park smarter, but do not treat the vehicle as invisible.
Creature advice got more specific
Marrowbreaches hit harder but attack less often. Nibblers see less, move slower, circle longer before attacking, react more to the Multitool, and also hit harder. Old creature notes need cleanup.
Visual notes and source media
Original route art
Abyss Guides uses original chibi deep-sea art for page visuals instead of copying wiki screenshots or fan uploads.
Source: Abyss Guides original artwork
Official Subnautica 2 gameplay trailer
Use the trailer for mood, vehicles, and biome context. Do not treat trailer scenes as exact farming coordinates.
Source: Official Subnautica YouTube embedWhat changed in Hotfix 3
DLSS and Frame Generation were patched
Unknown Worlds says Hotfix 3 fixes DLSS crashes, fixes DLSS settings not saving correctly, restores Frame Generation in some versions, and upgrades DLSS to version 4.5.
Base-building got one cheaper piece
Interior Wall costs were reduced to one quarter of their previous price. That is narrow, but it matters for early base layouts where players overbuild storage and room dividers.
Hammerhead and Tadpole behavior changed
Hammerheads no longer attack unpiloted Tadpoles, though they can still show interest. The patch also fixes cases where Hammerheads were not attracted to Flares.
Marrowbreaches and Nibblers changed feel
Marrowbreaches now deal more damage but attack less often. Nibblers have lower perception range, slower movement, longer circling before attacks, more Multitool sensitivity, and higher damage.
Co-op and crash fixes need retesting
Hotfix 3 fixes a rare crash when starting games and a multiplayer issue where clients could revert to their previous position after rejoining a session.
Hotfix 3 field scan
PC
DLSS 4.5
Graphics settings and crashes were patched.
Vehicle
Tadpole
Empty Tadpoles are safer around Hammerheads.
Creature
Nibblers
Less visible, slower, but more damaging.
Patch impact table
| Area | What to recheck |
|---|---|
| PC performance | DLSS, Frame Generation, and saved graphics settings should be retested before repeating launch-week advice. |
| Base building | Interior Wall cost notes should mention the one-quarter cost reduction. |
| Tadpole safety | Parking advice should say Hammerheads no longer attack unpiloted Tadpoles, but can still notice them. |
| Creature routes | Marrowbreach and Nibbler danger notes need new wording because both behavior and damage changed. |
| Co-op sessions | Rejoin-position rollback reports should be checked against the patched build. |
| Armor builds | Strike Armor stacking advice should be removed if it relied on the additive stacking bug. |
Do not treat Hotfix 3 as a content drop
This is a stability, settings, cost, and creature-behavior patch. It does not confirm new biomes, story chapters, or a 1.0 date. Keep roadmap claims separate from hotfix claims.
Patch notes change routes. Keep the checklist fresh.
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FAQ
When did Subnautica 2 Hotfix 3 release?
Unknown Worlds published Hotfix 3 on June 1, 2026.
Did Hotfix 3 upgrade DLSS?
Yes. The official notes say DLSS was upgraded to version 4.5, with fixes for DLSS crashes and saved settings.
Are Tadpoles safer after Hotfix 3?
Unpiloted Tadpoles are safer around Hammerheads because Hammerheads no longer attack them, but the notes still say Hammerheads can take an interest in Tadpoles.
Did Hotfix 3 change resources?
The official Hotfix 3 notes do not list broad resource-location changes. The cost change to watch is Interior Walls being reduced to one quarter of the previous cost.
Why does this patch matter for guides?
It changes advice for PC settings, base interiors, Tadpole parking, creature avoidance, multiplayer rejoin problems, and Strike Armor builds.