Hello everyone,

v4.0 is a massive update to Galactic Civilizations 4. We have added "Institutions" to boost your civilization's science, manufacturing, military, and more. You can now also build influence with political parties. We have added a mini-map to survey your surroundings better. Speaking of maps, we've added a map editor that lets you create custom maps you can share with others. Finally, we've added improvements to the diplomacy system. Read below for details.

NOTE: Old save games are not supported by this build. However, we've made a v3.3 for folks to continue their old saves.

New Features

Colonial Charter
Every civilization has access to the Colonial Charter government type that gives you flexible policy slots instead of locking you into a single strategy. Retune your policies as your empire grows and your priorities shift. Also unlocks "Institutions" and "Political Parties."

Map Editor
Stop rolling the dice on random galaxies. Lay out the stars, clusters and homeworlds yourself. Open the editor and place stars, clusters anomalies, and homeworlds in the galaxy. Jump straight into a game on your map or hand it to someone else.

Custom Maps
Start a game on any hand-built galaxy instead of a random one, and trade maps with the community.

Updated Turn Notifications
Everything that needs you each turn shows up right on the main screen — no digging through a log. End your turn and the events that matter surface directly in the lower right corner. Click one to jump straight to the planet, ship, or decision it's about.

Mini Map
A strategic read on the whole galaxy, always in the sidebar. Zoom, pan, and jump the main view without losing your place.

Political Parties
Your civilization isn't a monolith. Internal parties pull in different directions. Win their favor and they back you or ignore them at your peril. Parties form inside your civilization, each with its own agenda. Your decisions will please some parties and anger others. If you keep a party happy and you earn its support and bonuses; there are consequences to alienating them.

Institutions
Assign your leaders to run Institutions that boost your civilization's science, manufacturing, military and more. Stronger leaders produce bigger bonuses, so it matters who you slot where. Reassign leaders as your strategy shifts to steer the bonuses that matter most.

AI Improvements
Lots of AI upgrades across the board: expansion, war, diplomacy and government play all got smarter opponents behind them.

Diplomacy & Trade
A redesigned diplomacy system built for making better deals.

July 30th, 2026 Changelog

Art

• Thousands of UI and textures re-optimized for lower memory use and faster loads.

• Probe reveal and fog-of-war no longer leave straight "unexplored" seams at cluster boundaries.

• Event-revived dead planets no longer look dead.

• Starbase range rings update the moment their source changes.
  

Audio

• Updated volume levels of some ambient tracks.

• Added variety to the ambient track list.

• Shipyard ambient loop volume corrected and is no longer blasting at full volume across a 300-unit hear radius.
  

Engine

• Fixed many crash/assert guards across leader assignment and race-trait lookups.

• Fixed intermittent crashes tied to surveyed anomalies de-spawning mid-effect and to AI fleet stat calculations.

• Fixed a crash when exiting the Ship Designer from the main menu.

• Fixed a first-load click issue on newly-optimized UI art so buttons and icons register clicks correctly again.

• Saves referencing removed/renamed/modded techs recover gracefully with a user-visible fallback instead of crashing the tech screen.

• Multiplayer AI move-phase determinism hardening: desyncs from unordered iteration and shared-RNG asymmetry addressed on the AI planning path.

• AI war-aim and update planning now use the correct random stream, closing an intermittent multiplayer/save divergence path.

• Unlimited-range ship bonuses no longer poison the range cache with an infinite value when loading save games; older saves with the bad value self-heal.
  

Galaxy Forge / Map Editor

• Map Editor is now accessible from the main menu.

• Choose from one of several galaxy templates to get started.

• Place stars, clusters anomalies, and homeworlds in the galaxy; draw Hyperlanes on the map

• Load custom maps when setting up a new game.

• New maps are sharable with other players
  

Gameplay

• Reduced the escalating build-cost penalty for adding more improvements to an already-developed planet (halved from 5% to 2.5% per existing improvement).

• Government screen is now unlocked by the "Colonial Leadership Council" planetary improvement and given you the "Colonial Charter" government.

• Add Political parties: Progressives, Militarists, Industrialists, and Traditionalists)

  • Each citizens belongs to one of these parties.

  • Events may affect your approval with different groups.

  • Your civilization get bonuses based on your approval with the parties.

• Added Institutions on the government screen. Assign Leaders to to level up institutions and provide civilization wide bonuses.

• You can now load custom maps when starting a new game.

• AI opponents no longer surrender prematurely, with better deal valuation around trade.

• AI opponent planning fixes so the AI actually uses hub-clustering and adjacency synergies instead of ignoring them.

• Ship construction costs more when you're near your Fleet Supply cap.

• Insight (discounted random research) capped at 3.

• Recycling Center pollution effect improved from 5% to 8%.

• War Aims updates

  • Forced-ceasefire events are now optional (reject choice added) with a raised cooldown, instead of forcing surrender.

  • New War Fatigue approval penalty: past a war's max duration, the aggressor's citizens lose 1%/month approval and the target's lose 0.5%/month, capped at -50%.

  • Wars now run much longer before fatigue starts.

• Event-granted improvements (like the Yor Singularity Milestone's Neural Nexus) now actually get placed on your planet.

• Fixed a problem where an improvement would get completed but never appear on the planet.

• Auto-Mine: Players can now allow Asteroid Miners to auto-mine adjacent Asteroids and disable the recurring "Do you wish to mine?" confirmation popup from the Gameplay Settings menu.

• Auto-Survey: falls back to broader exploration when no survey targets remain

• Redirected shipyards no longer report themselves as idle while feeding a primary sponsor.

• Trade ships no longer stall or drop licenses mid-route: license validation happens on arrival, and retention through halt/redirect is fixed.

• New Reroll-Breakthrough-Techs Executive Order lets you reroll breakthrough options at a Control cost without incurring the Refocus penalty.

• Cloaked battles can no longer hard-hang the game: cloak grants an evasion modifier instead of untargetability, and a hard round-cap guarantees battles always terminate.

• Diplomacy tech trades validate against each player's actual (possibly custom) tech tree, so offers on non-Standard trees no longer appear tradable but fail on accept.

• First-contact trade windows can now add items to the trade window.

• Same-tile fleet moves: ships now face their travel direction instead of spinning or snapping after teleport-adjacent moves; halts stop and resume cleanly.

• Custom factions keep the tech tree you chose (Terran Alliance, Synthetic, etc.) through faction save/game start instead of silently reverting to Standard.

• The Manufacturing District now also requires the Civilian tech in addition to Engineering.

• When you gain a colonization tech via trade or espionage theft (or via research when another tech is queued), extreme planets are no longer rendered pink/locked.

• Player-facing "turns" are renamed "months" across the UI

Localization

• Large translation pass to cover 4.0 Party Events and fixes to several mistranslations and inconsistent terminology.
  

UI

• Polished Colony Summary window.

• Added on-screen smart notifications

• Added a mini-map to the information panel in the upper right, along with toggles for different map icons.

• Stations tab added to the main game window strip so Shipyards & Starbases are discoverable directly instead of buried under a Ships -> Stations sub-toggle.

• Alerts are now semi-transparent, tech tree titles fade cleanly at the edge, and political party icons show faction-flavored names (e.g. "Enforcers" for Xeloxi).

• Breakthrough tech discounts now appear immediately on the HUD, so there's no more closing/reopening the research screen to see accurate turns-to-complete.

• Promote/job-assignment menu no longer queues behind a cutscene or double-fires from spam-clicks; Esc/click-away closes the window cleanly.

• Input guards on the trade/route flow so you can open the window without pre-existing routes.

• Trade Route Value now has a proper tooltip on both its raw and modified stats.

• Diplomacy Report scrollbar/layout no longer clips or stacks arrows on short lists; small-list scrollbars render cleanly.

• "No-research" yield tooltip shows live yields instead of blank.

• Tech and shipyard tooltips corrected.

• Refactored the Leader Cards.

• Leader-related alerts and notifications route to the Government screen's Leaders tab.

• Recruit Leader entries: dual bonus icons now centered and evenly justified in their slots; long names render without clipping.

• The Leaders screen gained sort buttons (Name/Level/Stats), and every government screen's leader list gained Name / Level / INT / DIL / SOC / RES sort buttons.

• Leader sort tooltips now capitalize attribute names, and each attribute links to its Galactapedia entry.

• Assign-Governor dialog lists recruitable leaders alongside idle ones, cheapest first, so new players are no longer dead-ended by "no governors available."

• Updated the Fleet/Ship Context to make special actions more usable, and restored its command bar to two rows so Manage Fleet stays reachable on large fleets.

• Fleet/ship context card redesigned to a 3x3 stat grid with a full-width HP bar, per-weapon Beam/Missile/Kinetic stat rows, and multi-ship fleet HP now shown.

• Fleet card weapon stats populated with mixed Beam + Missile static blueprint loadouts (Lasers + Hypersonic Missiles replacing 3x Plasma / 4x Phased Cannons).

• Fleet card's Weapon Stat Breakdown tooltip's redundant "Details" header removed.

• Fleet Context: survey task label hidden; click tooltip moved onto the icon/stack for cleaner presentation.

• Fixed a duplicate defended shield on Fleet Context.

• Party description field now fits two-sentence descriptions cleanly.

• Party icons show faction-flavored names.

• New "X declared war on Y" line on the war aims tooltip.

• Asteroid context labels no longer clip long planet names.

• The Planet Context panel now shows a colored planet-class card with a tooltip.

• Tech Navigator opens on the first initialized category rather than a blank state.

• Stat Breakdown tooltip repositions correctly after it dynamically resizes so it no longer sits partly off-screen.

• GNN alert tab icon realigned so it sits flush with neighboring alert icons.

• Fixed a broken hot spot in the first tutorial.

• Starbase module entries you cannot afford are now greyed out, and the Build button is disabled with a tooltip naming the missing resource.

• Constructor starbase preview lines now match the starbase's actual coverage area instead of a stale range shape.

• Starbase membership, range rings, path graphics, tooltips, and AI queries all use hex distance consistently, so range previews match actual reachable tiles.

• Range rings snap to the hex grid so the circle matches where units can actually reach.

• Range visualization's range rings clean up on deselect and no longer leave ghost outlines when switching to a smaller selection; only changed clusters rebuild.

• Starbase tooltip now shows every strategic resource yield instead of dropping some as the list changes, and resizes/repositions correctly when yields or traits update.

• Notification toasts now draw above the map but beneath HUD panels and on-map screens, fixing occlusion issues.

• Single-choice notification events resolve automatically and keep their authored acknowledgement wording in the notification detail.

• Research District upgrades now use the correct research icon instead of the Computing Center icon.

• "Prison Labor Camp" and "Prison Research Lab" descriptions now note that building one precludes the other.

• Removed doubled percent signs from Drengin Prison Labor Camp and Prison Research Lab, and Festron Harmonious Antennae, Work Instruction Chamber, and Cerebral Chamber descriptions.