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Stellaris
Stellaris
Apr 9, 2026
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Stellaris Dev Diary #415 - The Gamma Menace

3/5 Moderate

BETADisruptor weapons now reduce enemy regeneration while the upcoming 4.4 'Pegasus' update will introduce the ability to join or leave ongoing wars.

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Key Changes

  • 1Disruptor weapons now apply a 10-day regeneration debuff to enemy Shields, Armor, and Hull
  • 2Upcoming 4.4 update will allow empires to join or leave wars already in progress
  • 3Fixed fleet creation logic that was spawning fleets 5x larger than intended for GDF and revolts
  • 4Significant buffs to Faculty of Archaeostudies artifact production and storage caps
  • 5Scourge Missiles damage corrected after previously dealing 5x intended damage
  • 6Astral Siphons buffed with higher thread production and storage but lower Physics bonuses
  • 7Purge mechanics now pause during active ground battles on a planet
  • 8AI budgets updated to better handle Starbase costs and bio-ship fleet rebuilding
  • 9Oppressive Autocracies can now build Medical Centers
  • 10Fixed several Out-of-Sync (OOS) issues in multiplayer, including DLC mismatch errors

All Changes

⚖️Balance(14)

  • changeFleets: Added a 10-year cap for how long a fleet can remain Missing In Action (MIA).
  • buffDisruptor Weapons: Disruptor weapons now reduce Regeneration Effectiveness on hit for 10 days (T1: -20% Shield/-10% Armor, T2: -35%/-20%, T3: -50%/-30%).
  • buffPsionic Disruptor: Psionic Disruptors now reduce Shield Regen by 35% and Fire Rate by 20%, stacking with other disruptors.
  • buffAdvanced Bio-Reactor: Increased Exotic Gas production of Advanced Bio-Reactor from 0.05 to 0.1.
  • buffMinistry of Production: Increased Alloy and Consumer Goods bonus for Ministry of Production and Production Center from 0.1 to 0.2.
  • buffFaculty of Archaeostudies: Biologists on Relic Worlds now produce +0.25 Minor Artifacts (up from +0.1).
  • buffArchaeo-Engineering: Archaeo-Engineering AP now increases Biologist Minor Artifact Production by +0.15 (up from +0.05).
  • buffMinor Artifacts: Increased Minor Artifact storage cap to 2000 and Archaeo-Engineering bonus to 3000.
  • buffFaculty of Archaeostudies: Reduced Faculty of Archaeostudies building upkeep from 10 Energy to 8 Energy.
  • buffAstral Siphon: Increased Astral Siphon thread production to +0.2, +0.35, and +0.50.
  • nerfAstral Siphon: Reduced Astral Siphon Physics bonus to +0.2, +0.35, and +0.50 (down from +0.25/+0.5/+0.75).
  • buffAstral Siphon: Reduced Astral Siphon upkeep for Consumer Goods and Energy/Minerals for Gestalts.
  • buffAstral Thread: Increased Astral Thread storage to +200, +400, and +600.
  • changeVoidworms: Reduced Voidworms fleet power to more accurately reflect their combat capabilities.

🐛Bug Fixes(10)

  • fixMutagenic Habitability: Fixed Mutagenic Habitability being capped at a lower threshold than stated.
  • fixFleets: Fixed fleet creation logic that was incorrectly spawning fleets five times larger than intended for GDF, Revolts, and Uprisings.
  • buffDoom of the Eater: Increased Doom of the Eater fleet size to compensate for ship size logic changes.
  • fixVolcanic Forge: Fixed Volcanic Forge technology not appearing for certain origins.
  • fixPurge: All purges now pause whenever a ground battle is occurring on the planet.
  • fixScourge Missiles: Fixed Scourge Missiles dealing 5x intended damage.
  • fixOppressive Autocracies: Oppressive Autocracies can now properly build medical centers.
  • fixIon Cannon: Increased Ion Cannon collateral damage from 20 to 100.
  • fixStorm Chasers: Fixed Storm Chasers having a decreased rather than increased chance to draw Storm techs.
  • fixLeaders: Fixed math error causing Level 1 leader costs to be too high on the beta branch.

🤖AI Behavior(3)

  • changeAI: Updated AI alloy and food budgets to better accommodate new Starbase costs.
  • changeAI: Adjusted AI food budget to ensure bio-ship empires rebuild fleets after war losses.
  • changeAI: Adjusted AI influence budgets to prevent immediate depletion on vassalization contract changes.

💻Stability(3)

  • fixMultiplayer: Fixed Out-of-Sync (OOS) errors occurring during hotjoins and player rejoins.
  • fixSpy Networks: Fixed an OOS related to Spy Networks.
  • fixMultiplayer: Fixed an OOS at game start caused by DLC mismatches and random empire selection.

📅Coming Soon(2)

  • newDiplomacy: New 'Join War' trade term allows empires to enter ongoing conflicts (Update 4.4).
  • newDiplomacy: Empires can now bribe opposing war leaders to leave a war in progress (Update 4.4).

Summary

4.3.4 'Cetus' Beta Updates

This update focuses on significant balance passes for weapons and specialized buildings. Disruptors have been reworked to serve as anti-regeneration tools, while the Faculty of Archaeostudies and Astral Siphons received substantial buffs to their resource production and storage capacities. Additionally, several critical bug fixes address fleet scaling issues and purge mechanics.

4.4 'Pegasus' Preview

Looking ahead, the 4.4 update will fundamentally change Stellaris diplomacy by allowing empires to join or leave wars already in progress through trade terms and bribes, moving away from the current static war participant system.

← OlderStellaris Dev Diary #414b - Portrait Substitution SystemApr 2, 2026

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