Livestream: v1.5 "Diplomatic Repercussion" Update for Sins of a Solar Empire II
Article posted on 12/5/2025
Tune in for the v1.5 "Diplomatic Repercussions" Livestream Event
Mark your Calendars | Learn More

Watch the team play through the new features of this massive free update for Sins of a Solar Empire II.
đź“… Wednesday, December 10th at 1:00 PM EST
📍Location: Sins of a Solar Empire II Steam Page
What to Expect
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Overhauled 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.
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New Quick Start Options: New game setup options let players determine their initial start conditions. Role-players can select the ‘Basic’ option to start with just a light factory, while ‘Quick’ and ‘Advanced’ players can begin with planets, fleets and more.
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Improved AI Opponents: AI players react more dynamically to changes over the course of a game. Players will notice them making better decisions throughout their playtime.
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Updated Mod UX: The modding GUI has been updated to not only be faster, but to provide more information to players. Ratings and category information are now available in a mod’s tile; the addition of a download/install progress bar for larger, total-conversion mods lets players know how long an install may take.
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Economic Rebalance: The game’s economy has been fully rebalanced to bring more of the economy into orbit instead of on planets.
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Research and Tech Tree Layout: Tech trees are now less cluttered visually; similar subjects now grouped together for ease of use. Updates to research pacing lower requirements so players won’t need as many research stations to reach higher tier technologies.
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Orbital Traffic: To help bring the galaxy to life, Orbital Shuttles have been added that will automatically travel between population centers in the game as a fun visual element to enhance immersion.