Stellaris update 4.3 is now available to download on PC. According to the official Stellaris patch notes, the latest update 4.3 addresses some bugs and crashes.
Previously, a major update 4.3 added new changes, fixes, and gameplay improvements.
Unfortunately, players are still experiencing several issues since the release. Today’s Stellaris version will fix a few of these issues.
Check out more details below.
Stellaris Patch 4.3 Notes – January 30, 2026
Balance
- Voidworms will be less likely to attack a planet with fewer than 1000 pops.
- Changes to the Necrophage Origin:
- Necrophage Chambers of Elevation now block pop growth for necrophage species.
- Necrophyte Apprentice jobs now boost the pop growth of non-necrophage species on the same planet by a small amount.
- These changes mean that the pop growth weirdness of the origin should be gone and planets with Necrophyte Apprentices should retain a high rate of growth of the secondary species, with the once per decade rituals mass converting pops to the primary species.
- When playing a hive-minded necrophage, the force spawned pre-ftl empires are no longer hive-minded.
- Entropy Drinkers civics
- Replaced the scaling empire-wide energy credit production from Entropy Drinkers civics with “Energy Credits per 100 Psionic Pops: +0.5”
- Entropy Drinkers councilors now give +3% Leader XP per level.
- Taking any non-Psionic ascension path now blocks you from reforming into Entropy Drinkers, since starting with the civic locks you into psionic ascension.
- Chosen civics now give +10% Unity at 1,000 attunement points (was 50%)
- Space Fauna now have 10% Armor and Shield Hardening per rarity tier for each tier above Common
- Modifiers for rural jobs from Storm Relief Centers have been halved.
- Reduced the power of the Prethoryn, Contingency, Extradimensionals, Great Khan, Diadochi, Tempest, and Dessanu fleets by approximately a third.
- Cybernetic Ascension:
- Added two new positive Cyborg species traits for pop growth and bureaucrat output.
- The Metabolic Reprocessing now also gives robot assembly from Augmentor jobs and organic assembly from Roboticist jobs.
- The Integrated Anatomy no longer gives +1 organic species trait pick but instead +1 robot species trait point and +1 robot species trait pick.
- Robot pops should no longer be penalized by reduction to non cyborg pop happiness.
- Cyber Hives now receive temporary buffs (+3 skill level, +25% xp gain) to their Nodes as well as planets (+15% job productivity and -7.5% job upkeep) when assimilating new cyborgs into the collective. Devouring Swarms receive these bonuses upon purging pops instead.
- Driven Assimilators now unlock additional effects on their cyborg traits for their ruler (-35% cyborg upkeep and +15% complex drone productivity) and governors (+20% replicator output).
- Augmentors now produce 1.75 engineering research, up from 1.5, as well as 1.75 society research. The driven assimilator variant now provides 3 pop assembly, from 2. (The regular variant instead grants robot assembly, as mentioned above).
- The society research output of genomic researchers and spawning drones (after completing genetic ascension) from 4.5 to 3.5 to bring them in line with this.
- Reduced the power of Awakened Fallen Empires and Cetana’s fleets by roughly half.
- Increased many sources of Command Limit and Naval Capacity.
- Galactic Force Projection, War Games (Supremacy Traditions), and Better Glandular Stimulation (Behemoth Fury Crisis Perk) now grant Command Limit multipliers instead of flat values.
- Increased the costs to build larger and higher tier ship sections and ship components. This includes the Fallen Empire ships from Cosmogenesis.
- Reduced the damage reduction of Crystal Plating to 1/2/3 and 2/3/4 from 1/2/4 and 2/4/8.
- Slightly improved mineral deposits on Asteroids and energy deposits of many stars.
Bugfix
- All awakened empires now get their automated production bonuses.
- Increased Voidworm Command Limits so they can now fit enough adults into a single fleet to merge into a troika.
- Let us know if the Voidworm Plague keeps eating the galaxy.
- Scrapping robots during an alloy deficit now gives 1 alloy per pop instead of 100 alloys per pop.
- Regular empires can no longer psionically awaken robots.
- A mysterious ghost district no longer sometimes appears in the UI for the Synaptic Lathe.
- The Interloper in pre-ftl Shattered Ring systems can now be removed.
- Fixed resettlement costs being inconsistent.
- Storm Relief Centers can now be built.
- Some slaves no longer benefit from job efficiency bonuses twice.
- Fixed the tooltips for Battle Thrall slavery and Military Service to clarify that slaves need to be Battle Thralls to be soldiers.
- The rampaging trees no longer continue to kill everyone after they have in fact been defeated.
- Some bioship components that escaped earlier cost and upkeep adjustments now match their mechanical counterparts. The same is true for Offspring ships.
Performance
- Removed some redundant modifier updates from Armies and from Pops
- Optimized allocations when counting species
- Moved script calculations out of modifier calculations for better performance
- Moved some trigger evaluations out of modifier calculations for better performance
- Fixed a bug that was disabling threading of the economic system introduced in earlier open beta. This should be especially noticeable (or rather, should no longer be noticeable) on the monthly calculations, which should be more seamless now.
- Fixing performance regression in language localization system.
Stability
- Addressed some stack overflows on macos
Modding
- Added support for districts_per_building for District Specializations. This allows limiting the number of buildings based on the number of built districts but is not currently being used yet.
Download Stellaris update 4.3 on PC.
