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Stellaris
Stellaris
4.5|Jul 9, 2026
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Stellaris Dev Diary #428 - 4.5 ‘Cygnus’

5/5 Game-Changing

BETAStellaris v4.5 introduces a fundamental overhaul to Pop Ethics and Factions alongside native Apple Silicon support, while v4.4.5 adds a Resource Abundance slider and major Nomadic empire refinements.

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Key Changes

  • 1Complete overhaul of Pop Ethics and Factions into a percentage-based system (Breaking Change)
  • 2Native Apple Silicon (arm64) support for macOS users
  • 3Operational Reserves overhaul for Nomads with scaling caps and a new Critical stage
  • 4New Fleet Doctrine and Weapon/Defense Preference policies for ship automation
  • 5Resource Abundance slider added to galaxy generation settings
  • 6Independent map border, fill, and ship color customization in empire creation
  • 7Knights of the Toxic God and Cosmogenesis content unlocked for Nomadic empires
  • 8Granular per-action fleet automation settings for Arkships and Construction ships
  • 9Consecrate World reworked into a deterministic empire-wide bonus system
  • 10Space Fauna now disable Waystations instead of destroying them

All Changes

📅Coming Soon(10)

  • changePop Groups: Pops are no longer divided by single Ethics/Factions; instead, each group has a percentage distribution belonging to each faction/ethic (Breaking Change).
  • newmacOS: Added native support for Apple Silicon (arm64), removing the requirement for Rosetta 2 on macOS.
  • newPolicies: Added Fleet Doctrine, Weapon Preference, and Defense Preference policies to control auto-designer behavior for ships and starbases.
  • newEmpire Creation: Added independent selectors for map border, map fill, and ship colors in empire creation.
  • newKnights of the Toxic God: Unlocked the Knights of the Toxic God origin for Nomadic empires.
  • newNomadic Empires: Unlocked Cosmogenesis and Storm Chasers content for Nomadic empires.
  • changeConsecrate World: Reworked Consecrated Worlds to grant deterministic empire-wide bonuses to Unity, Amenities, and Ethics Attraction (+10%/20%/40%) based on the number of worlds.
  • newFederations: Federations can now enact laws for automatic Commercial Pacts, Wayline Pacts, and Research Agreements.
  • buffCybernetic: Cybernetic species trait now provides an additional +5% Job Efficiency.
  • nerfKnights: Increased base Knight upkeep by 0.15 Alloys and 0.15 Consumer Goods.

🌌Galaxy Generation(1)

  • newGalaxy Settings: Added a Resource Abundance slider in galaxy settings ranging from Scarce to x5 (default x2).

🛸Nomadic Gameplay(7)

  • changeOperational Reserves: Operational Reserves now track Energy and Minerals at a 1:1 ratio (previously 3:1).
  • buffOperational Reserves: Maximum Operational Reserves now scale with Arkship count and tier (base 15,000 + 5,000/7,500/10,000 per Tier I/II/III).
  • nerfOperational Reserves: Added a Critical stage to Operational Reserves with severe penalties to Research, Unity, Alloys, and Pop Efficiency.
  • newVoidlure: Added Waystation Voidlure and Arkship Voidlure Array modules to lure space fauna.
  • changeSpace Fauna: Space Fauna now disable waystations instead of destroying them.
  • buffNomadic Empires: Reduced opinion penalties for strip-mining, reprocessing planets, and Exodus Jumps.
  • nerfSoldiers: Arkship District Specializations that increase weapon damage now add +0.15 strategic resource upkeep to Soldiers.

🤖Automation & AI(4)

  • changeFleet Automation: Fleet automation now offers per-action options for Arkships and Logistic ships (Harvest, Strip Mine, Deep Scan).
  • newConstruction Automation: Construction Automation now includes options for Mining Stations, Research Stations, Observation Posts, and Special Projects.
  • changeAI: AI empires now adopt fleet doctrines and weapon preferences matching their personality.
  • changeShip Designer: Auto-generated ship designs are now fully regenerated when new technology is researched.

🖥️UI/UX(3)

  • changeMap Mode: Details map mode now toggles between three states: Normal, Detailed, and Hidden.
  • newPolicy Menu: Policies are now grouped into collapsible categories (Military, Diplomacy, Economy, Research, Society).
  • changeUI: Operational Reserves topbar tooltip now shows predicted monthly change and resource breakdown.

🐛Bug Fixes(6)

  • fixGalaxy Generation: Fixed Tombworld Earth spawning too frequently, often replacing the UNE.
  • fixArkships: Fixed capital Arkships being unable to find precursors due to legacy script.
  • fixStability: Fixed a crash related to updating waystation networks.
  • fixPerformance: Fixed science ship automation causing a recurring daily stutter when no target was available.
  • fixEthics: Fixed pop and country ethics being progressively wiped across the galaxy during play.
  • fixArkships: Fixed Arkships unintentionally syncing to the same auto-generated design and overwriting each other.

Summary

4.5 ‘Cygnus’ Open Beta

The headline change in the 4.5 update is a complete rework of how Pops interact with Ethics and Factions. Instead of Pops being divided into single-ethic groups, each group now contains a percentage-based distribution of ethics and faction alignment. This is a breaking change that will not preserve save game compatibility. Additionally, the game now runs natively on Apple Silicon for macOS users, and new Fleet Doctrine policies allow for deeper control over automated ship designs.

4.4.5 ‘Pegasus’ Live Update

This update focuses on the Nomadic playstyle and galaxy customization. A new Resource Abundance slider allows players to fine-tune resource density from 'Scarce' to x5. Nomadic empires receive a significant overhaul to Operational Reserves, which now scale with Arkship count and tier rather than a fixed cap. Fleet automation has also been expanded with granular per-action settings for Arkships and Construction ships.

← OlderStellaris 4.5 'Cygnus' Open Beta updated (bfcc)Jul 7, 2026

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