Sins of a Solar Empire II — patch notes and updates
Stored observation / content update:
Dated developer announcements recorded from Steam. Open the source for the complete update.
| Update | Date | Excerpt / source |
|---|---|---|
| Hotfix Notes for May 11, 2026 | 2026-05-11 | Version 1.60.3 (Hotfix) NotesFixed bug that would cause the game to display multiple languages at the same time, if you changed your language setting repeatedly within the same session. This should also resolve a rare hang bug.Fixed bug that would have some tooltips display “inf” instead of their true value.Fixed bug that would sometimes cause point-defense weapons to overkill missiles.Fixed bug that caused units to ‘teleport’ to off the game map. This was due to a race condition in the physics system. Note that there’s a similar corvette bug that is not yet fixed (will be in next hotfix).Map Generator:Added additional invalid characters to n |
| Video Blog: v1.6 "UI Horizons" Update Pt. 2 | 2026-05-07 | In this second video developer journal for Sins of a Solar Empire II, we're taking a look at the gameplay changes added in v1.6 "UI Horizons", including new active use abilities for static defense Military Structures. |
| Video Blog: v1.6 "UI Horizons" Update Pt. 1 | 2026-04-30 | In this video developer journal for Sins of a Solar Empire II, we're taking a look at the new and improved front-end user-interface added in the v1.6 "UI Horizons" update. We also show off the new hand-crafted leader portraits, a ship viewer tool, and some new ship color customization options. |
| 'UI Horizons' Update Now Available | 2026-04-30 | UI overhaul, in-game map editor, new defense platform abilities, and more arrive in the v1.6 updateView the full changelog\Front-End UI OverhaulThe entire front-end UI has been rebuilt from the ground up. The new layout surfaces more information at a glance, cuts dead space, and brings a cleaner visual style throughout. A new Faction Selection screen gives you a breakdown of each faction's identity, special abilities, and units, including a live 3D Unit Preview Window where you can rotate and inspect any ship or structure, complete with any unlocked mesh upgrades. Single- and Multiplayer lobby windows have been refreshed, and the Random Map U |
| Dev Journal: New UI Horizons and Player Customization Pt 1 | 2026-04-22 | Our resident UI guru Paul Kiesling will be giving us part one of a two-part series on this UI revamp below:With this month's update comes a functional refresh of our front-end UI. We have spent the last several months really digging into the UI to improve the user experience and feel. We have moved away from the holographic stylization and towards a more hardened TEC feel, with emphasis on readability and organization. We went through every menu and intentionally lined up all of the universal elements between pages to make moving between windows seamless and smooth.Let's start with the newest screen to be introduced, the Newsfeed, located on |
| Hotfix Update Notes for April 16, 2026 | 2026-04-16 | Fixed unit momentum bug where unit velocity wasn’t being maintained in between orders. This would cause units to stop and then re-accelerate. Fixed loot collection AI bug where AI units would get ‘stuck’ trying to collect loot. Enemy AI units should now properly try to destroy units near loot so they can collect it. Fixed issue where units would not gain XP when collecting loot. Improved cursor selection behavior when selecting units in dense formations. Fixed unit pathfinding assert that could be caused by AI units trying to navigate around obstacles. |
| Update Notes for April 7, 2026 | 2026-04-07 | Fixed audio engine crash that could be caused when unloading a mod. Fixed a crash in the GUI system when quitting the game. Fixed mod.io unlisted mod and mod mismatch issues that could occur. Fixed crash when loading old scenario (v1.50) save games. |
| Video Blog: v1.51 "Hunt fer Booty" Update | 2026-04-02 | Avast yer scurvy scallywags! The "Hunt fer Booty" update dropped at the start of March and it's time to take a look at what Sins of a Solar Empire II looks like with *proper* Pirates in the game.Bounties can now be placed on the heads of your rivals, Pirates have their own brand new Capital Ship, Minor Factions exhibit new Raiding behavior and two new Advent Minor factions enter the game too. We've reworked the Civilian Structure Capture system, and made a significant rebalance to combat to ensure early game Ships properly counter one another. |
| Update Note for March 18, 2026 | 2026-03-18 | Hotfix to fix AI 'hang' caused by Pirate Galleon incursion bug. |
| March 12, 2025 - v1.51.14 Hotfix | 2026-03-12 | Fixed crash caused by using wide characters in modding file path (e.g., Chinese, Korean, Japanese). This was preventing the game from starting up.Fixed issue where existing mod directory wouldn’t migrate as expected. When you change your Mod.io directory now, the game will bring up a dialog to display progress and ask you to restart the game when finished.Added ability to unsubscribe/install mods via the Mod.io Manage tab (click the X button on the left side). This now allows you to uninstall ‘dead’ mods that are no longer available on the Mod.io server.Can no longer unsubscribe from an active mod. Need to deactivate it first.Added download/i |
| Hotfix for March 6, 2026 | 2026-03-06 | Fixed in-game multiplayer server browser not showing public games in the list. |
| Hunt fer Booty Update Now Available | 2026-03-05 | New pirate capital ship, bounty system, minor faction raids, and more arrive in the v1.51 updateView the full changelogNew Unit: Pirate Galleon Capital Ship The Pirates have a new flagship. The Galleon is a playable capital ship with four unique abilities, bringing some new tactical options to the table.Bounty System A new Bounty Office in the Markets window lets players spend resources and exotics to put a price on enemy planets. Place a bounty, and the Pirates will come knocking. Any player can collect bounty by dealing damage in that gravity well, adding a new economic layer to conflict.Minor Faction Raids Hostile Minor Factions now conduc |
| Dev Journal: Pirate Incursions | 2026-03-04 | In our last dev journal, we introduced the Pirate Galleon and hinted at unsubstantiated reports of these fearsome vessels roaming the phaselanes and attacking planets. We advised that a wise admiral should be prepared for anything.Consider this your preparation.The Pirate Incursion is a new game event in which a Pirate Galleon will actively target a player's territory, stage a forward operating position on their border, and launch escalating waves of Pirate raiders against their planets. This isn't a bounty raid you can redirect with credits. This is a sustained assault, and it won't stop until you deal with the source.Anatomy of an Incursion |
| Ashes of the Singularity II Demo Available Now on Steam Next Fest | 2026-02-23 | Free massive-scale RTS demo includes two factions, 8-player multiplayer, three maps and full skirmish modePlay the demoStardock Entertainment and Oxide Games announced today that a free demo for Ashes of the Singularity II, the highly anticipated sequel to the massive-scale RTS, is available now as part of Steam Next Fest. The demo will feature two factions, 8-player multiplayer, and full skirmish mode. Ashes of the Singularity II is an RTS where you command thousands of units across continent-sized maps, fighting a war for control of the solar system.The Ashes of the Singularity II demo is set in a near future where the United Earth Forces r |
| Dev Journal: Introducing the Pirate Galleon | 2026-02-04 | The Pirate Galleon is a new and powerful capital ship created to serve as the centerpiece around which the expanded Pirate faction can operate.Based on the hull of a stolen Akkan Battlecruiser, the Pirates have made considerable modifications, transforming this normally lightly armed support vessel into a terrifying improvised battleship. A pair of jury-rigged, overcharged Gauss Cannons adorn the bow, giving the vessel a significant punch against opposing capital ships. Massive box launchers house unique Heavy Torpedoes capable of dealing significant damage to any titan or starbase. A large array of Medium Autocannons and PD Autocannons keep |
| Video Blog: Popular Mods in Sins of a Solar Empire II | 2026-01-14 | Sins of a Solar Empire II has extensive modding tools to help creators in the community bring their ideas to life, to mutate, enhance and alter the game in many different ways. In this video, we’ll take a look at a small selection of the more popular mods that alter Sins II in various ways to give you an idea of what is on offer. These mods tweak statistics or remove limitations on existing units, add new Maps, or overhaul the game with entirely original content such as new Ships, Starbases, Technologies and more!All these mods can be found and accessed on the mod.io site or through our in-game mod browser. |
| Dev Journal: The Diplomatic Method (How to Win Friends and Influence People) | 2025-12-17 | In the last Diplomatic Method dev journal, Yarlen walked you through all of our new Diplomatic stats like Patience, Trust, Rivals, and other racial and factional modifiers.In the Diplomatic Agreement window you can see a breakdown of all of the factors going into a AI player’s willingness to accept deals. Each field has a tooltip that will tell you what’s contributing to those percentages or an explanation of what they are.Patience, young grasshopper…Under the new Diplomatic system, Patience is an important thing to keep in mind. You shouldn’t spam AI opponents with shoddy deals because you will exhaust their patience (until it recovers over |
| Hotfix Notes for December 16, 2025 | 2025-12-16 | We've released a minor hotfix to address issues that have been reported since the initial v1.50 release. Change notes are below:GameplayTECExtractors are somewhat over performing for all factions, so have been reduced in income. The TEC meanwhile, struggle a little with both Credit costs and the relative value of Trade in the middle stages of the game. Increasing the Credit income from Trade should help smooth the economic progression for the faction. With the Javelis now somewhat more in check in the mid and late game, the TEC need a little more potency in the higher tier combat units - specifically the Harcka. Some economic and defensive im |
| Now Out: v1.5 Diplomatic Repercussions Update | 2025-12-10 | Sins of a Solar Empire II v1.5 Free Update Releases TodayNew Update features revamped Diplomacy System, new Quick Start options, AI improvements and more for all who own Sins of a Solar Empire IIView the full changelogJust in time for the holidays, Stardock Entertainment has gifted players a huge free update for Sins of a Solar Empire II today. Sins of a Solar Empire II v1.50 - The ‘Diplomatic Repercussions’ Update features a big overhaul to the game’s diplomacy system that gives players more control over the strategic alliances and enemies they make in their quests for galactic dominance. In addition, this update features new Quick Start opt |
| Livestream: v1.5 "Diplomatic Repercussions" Update | 2025-12-05 | Tune in for the v1.5 "Diplomatic Repercussions" Livestream EventWatch the team play through the new features of this massive free update for Sins of a Solar Empire II.📅 Wednesday, December 10th at 1:00 PM EST📍Location: Sins of a Solar Empire II Steam PageWhat to ExpectOverhauled Enhanced Diplomacy System: A reworked diplomacy system allows for greater flexibility and options to players. AI players now consider multiple factors when choosing diplomatic partners. Also, players can now trade influence and items.New Quick Start Options: New game setup options let players determine their initial start conditions. Role-players can select the ‘Bas |