Paradox Interactive announced today that the newStellaris: Cosmic Stormsexpansion for the sci-fi strategy game is set to launch via PC on Jul 16, 2025. The new expansion brings new technologies and edicts to respond to the new Cosmic Storm threat as well as the all-new Storm Chaser origin and two new precursor stories.
While storm systems already exist inStellaris, the newCosmic Stormsexpansion adds 8 new types of Cosmic Storms that replace the existing Space Storms and randomly spawn across the map. The new Cosmic Storms are Electric, Particle, Gravity, Magnetic, Radiant, Stardust, Shroud, and Nexus. The storms will automatically grow, shrink, and change speeds as they work their way across the galaxy.
Alongside the storms is the new Storm Chaser Origin, an empire of people that seek to push themselves beyond their own limits. As such, they strive for enlightenment by engaging with the new fierce Cosmic Storms that the universe sends at them.
With the new Storm Chaser Origin comes three new civics: Astrometeorology, Storm Devotion, and Environmental Architects. There are also two new precursor stories that discover the stories of the Ancients, vanished masters of the storms: Weather Manipulators and the adAkkaris Convention of Benevolence. Completing each narrative will unlock a new relic.
Stellaris: Cosmic Stormswill be released on PC via Steam on June 30, 2025, at the price point of $12.99. It’s part of the Season 8 Season Pass and will also be added to the monthly Expansion Subscription forStellaris.
