This is an archive of patch notes originally posted on 11 Dec 2025.

Stellaris

Stellaris Patch 4.2.4 released (checksum 7a03)

Posted by MrFreake_PDX on

written by PDX-Loke

Hello,

Another patch has been readied, resolving a few more issues discovered in the 4.2 and Infernals release.

4.2.4 should now be available for download via Steam, GOG. MS Store will follow shortly.

Please find the patch notes below.

STELLARIS 4.2.4 PATCH NOTES

Balance

  • +25% volcanic world habitability for machine climate preference traits to match their minimum habitability value on Volcanic worlds.

  • Replaced Food output for some specimens with one quarter as Alloy output bonus for Infernals.

  • Slightly lower Unity and Research rewards for several events in the Red Giant and Cosmic Dawn Origins.

Bugfix

  • The Payback origin now get the correct starting buildings as Materialist and Spiritualist

  • The trait Propaganda Machines now shows the correct modifier

  • When transferring planets under colonization after a war is on, if the colonizing species isn't allowed to colonize the colony is destroyed (stops forever colonization where you keep sending the new colons to the slave pits)

  • Fixed leaders losing ascension related traits after species modification in some cases.

  • The tooltip for Permanent Employment Civic's Reassigners say they use "Food (or equivalent)", implying they use Alloys when you are Thermophile.

  • Ringworld construction and other binary/trinary restrictions correctly apply in binary or trinary hyperthermia systems.

  • Replaced minor additional food upkeep for hive mind unity boosting buildings with extra Alloy upkeep.

  • Fixed infernal Alloy upkeep for Voidling, purging, and non-sapient pops.

  • Voidworm Troika designs can be saved.

  • Voidworm Troikas are no longer created without upgrades when three large voidworms combine.

  • Fixed some issues with machine empires, catalytic processing and alloy producing jobs.

  • Fixed stuck in combat when the defender refuses to actually do combat.

  • Volcanic Districts now improve tech weights.

  • Preventing evasion to go negative from evasion against psionic modifier in combat calculation.

  • Fixing abduction code setting the species correctly when checking if species can live on planet.

Performance

  • Optimized string allocation in ship component modifier processing.

Stability

  • Fixed random CTD with invalid ships

  • Changed stack allocation to heap in particle varied values to avoid CTD:ing

  • Fixed CTD due to race condition between UI and AI accessing base growth cache.

  • OOS fix: Planet species caches are now stored in arrays instead of unordered sets or maps"

UI

  • Shows the 25% Minimum Habitability on Volcanic worlds for Mechanical and Machine pops

Enjoy!