Sins of a Solar Empire II: Harbinger
The long wait is over as the deadly faction, the Eidolon, arrives in Trader space! Command the power of corruption, stealth and psionics to conquer all before you in this major expansion for Sins of a Solar Empire II.
- Release date
- September 3, 2026
- Platforms
- Windows
- Developer
- Ironclad Games Corporation, Stardock Entertainment
- Publisher
- Stardock Entertainment

Screenshots & videos
Official media supplied by the listed storefronts and publishers.
Screenshots
Videos
About Sins of a Solar Empire II: Harbinger
The Vasari have been running for nearly 10,000 years from the 'great threat' that destroyed their empire. For 35 years, they’ve warned anyone who would listen about it drawing near…. Now, they have arrived: the Eidolon. The Eidolon don’t value typical assets like other races, but they do exploit them as a way to spread their corruption more effectively. They seek only to corrupt those they encounter, transforming them into something else to empower themselves. FeaturesPlanetary Transformation: The Eidolon spread corruption across the galaxy to empower themselves and their worlds.
As populations fall under the Eidolon’s influence, their planets gain corruption over time. Once a world has fully fallen, it can be shrouded, greatly expanding the upgrades that planet can support. Unit Corruption: Corruption empowers Eidolon units in combat as well as weakens them. As an Eidolon ship gains corruption, its hull dwindles while its offensive power increases. Enemy forces can become infected by corruption, giving the Eidolon another advantage. Null Weapons: Eidolon weapons are far more advanced than those of the other factions; and can negate shields and spread corruption against enemies.
Cloaked Ships: Subterfuge is one of the great enemy's sharpest weapons, as seen on the Kalizaeth Profaner support capital ship. New cloaking and detection systems let the Eidolon appear and vanish at will, enabling hit-and-run tactics that reward patience and punish anyone caught off guard.…
Read the full description on Steam ↗Download Sins of a Solar Empire II: Harbinger
Continue to an official storefront to download or purchase this title.

Sins of a Solar Empire II: Harbinger reviews & player comments
Store ratings and available player reviews. Review snapshots show their last refresh date.










Most helpful8
Most recent8