Galactic Civilizations IV: Supernova Galactic Civilizations IV: Supernova Galactic Civilizations IV

(INSIDERS BUILD ONLY) v3.3 Update Changelog

Published on Friday, April 10, 2026 By RammaStardock In GalCiv IV Support

Access Steps

Steam 

  • Select Galactic Civilizations IV from your Steam Library list. 

  • Right-click and select "Properties." 

  • Select the Game Versions and Betas tab. 

  • From the list, select "Insider" and click Close. (if you don't see this option, restart Steam.) 

Steam should pull down the changed files; if you ever want to return, do the same as above but select "default." 

Epic 

  • Open the Epic Launcher 

  • Select "Galactic Civilizations IV: Supernova - Insider's Edition" 

  • Install and play! 

Please note: The opt-in (Insider Build) is an early preview of the next update, and you might experience bugs or other issues. 

April 10th, 2026 Change Log


AlienGPT

  • Custom factions now always use the default tech tree, simplifying faction creation

  • DLC-locked logos and ship styles are now properly filtered out of the faction creator

  • Leader image generation in the faction creator now loads more smoothly

  • Added more random behavior to allow for great variance

  • Fixed an issue where DLC logos could appear twice in the custom faction picker

Controls

  • F1 through F9 now open bottom bar screens directly (Civilization, Leaders, Policies, Culture, Executive Orders, Achievements, Diplomacy, Artifacts, Bazaar). Existing users may need to reset hotkey settings to pick up the new defaults

  • Event popups now support pressing 1, 2, or 3 to quickly select and confirm a choice

Gameplay

  • Pollution Bomb now correctly pollutes only the targeted colony instead of affecting your entire faction

  • Missile Volley and Antimatter Bomb abilities no longer lock out your other abilities for a turn

  • Precursor Drive and Precursor Beam no longer vanish from the build list after being used once

  • Executive orders with explorer restrictions have been loosened, making them available in more situations

  • Removed duplicate Human-specific versions of the Invite Leaders and Go Faster executive orders

  • Ship exploration and auto-harvest targeting now pick destinations consistently instead of randomly

  • Hyperlane travel now ignores distant hyperlanes that would cause extreme detours

  • Long-distance pathfinding now has optimized search settings when creating a path

  • Collapsing Ice Bridge event choices now cost credits (100 or 200 depending on the choice) instead of granting free ideology points

  • Wars of Annihilation now scale their destructive effects dynamically based on the conflict

  • Fog of war now properly updates for allies when you have an exploration treaty

  • Adaptive AI is a new gameplay option that helps struggling AI players stay competitive with gradual bonuses that fade as they catch up. Enabled by default in gameplay options

Improvements

  • Several homeworld improvement bonuses now correctly apply to units instead of the colony

  • Several Terran improvements (Xenobiology Station, Atmospheric Purifier, Environmental Control Station, Metaverse Node) now have adjacency bonuses and level scaling they were previously missing, making placement decisions more meaningful

  • Homeworld Event improvements (Hyperdrive Research Center, Logistics AI Hub, Food Replicator Factory) can now be rebuilt if the colony is lost or the improvement is destroyed, as long as you made the corresponding event choice

Starbases and Shipyards

  • Entertainment Hub starbase module now correctly boosts approval for units in its area of effect instead of colonies

  • Starbase range bonus from a Human tech now properly applies globally

  • Starbases and Shipyards now have longer weapon ranges, especially for kinetic weapons which were significantly underperforming

  • Shipyard and general module building now has an alternate tech prerequisite through Civilian tech

Tech

  • Added alternative tech prerequisites to several quests, giving players more paths to trigger them

  • One Human executive order now requires a different tech, better matching its intended unlock timing

  • Added an alternate tech path to unlock the Singularity Power Plant improvement

  • Wonders like the Astrolab of the Arnor, Infinite Archive, Grand Menagerie, and New Eden no longer require direct Human tech prerequisites

Graphics

  • Fixed issues with incorrectly displayed paths for ships

Stability

  • Fixed crashes in the shipyard and the research screens

  • Removed redundant Shipyard hotkey binding

  • Fixed potential crashes related to missing faction data and ship style lookups

  • Reduced memory usage during turn display, freeing up RAM for smoother gameplay

  • Fixed potential crashes in the faction creator when selecting logos, ship styles, or station art

  • Fixed a potential crash related to missing faction data on startup

  • Fixed potential crashes when game data hasn't fully loaded during startup

  • Fixed startup initialization order so translations and error codes load at the right time

  • Hypergate visual effects now properly reset their lighting when initializing, preventing leftover visual effects

  • Thumbnail generation is now more resilient during game transitions like starting a new game or returning to the main menu

  • Improved the safety of how the game renders and removes visual elements, reducing the chance of crashes during complex scenes

  • Added in fixes for potential memory leaks

  • Fixed potential crashes related to AI decision-making, player stats, the battle viewer, and planet visual cleanup.

UI

  • Slightly reduced font sizes in large-UI mode for a cleaner look

  • Tech unlock icon rows now show a single summary icon for ship designs instead of listing every ship individually

  • Resource-harvesting unlocks are now grouped into a single summary icon

  • Hovering over summary icons shows a tooltip with the full list of unlocked items

  • Galaxy view zoom transitions are now smoother, with adjusted camera heights and fade distances for a better visual experience when zooming between views

  • Fixed the crime indicator color for Ministers to be more readable

  • Uninhabitable planets now show up in star system summary counts

  • Galactic resources (like Promethion and Durantium) now show a Harvest button on their context card, letting you claim them directly without manually selecting a starbase

  • Uncolonized planets now display their planet class and a colonization hint in the context panel instead of being blank

Tales of the Terran Alliance DLC

  • The Forge no longer shows duplicate missions