Buy Stellaris: Utopia DLC EU Steam

This bundle includes the following:

• Megastructures: Build wondrous structures in your systems including Dyson Spheres and ring worlds, bringing both prestige and major advantages to your race.
• Habitat Stations: Build “tall” and establish space stations that will house more population, serving the role of planets in a small and confined empire.
• Ascension Perks: Collect Unity points and adopt Traditions to unlock Ascension Perks that allow you to customize your empire in unique ways. Follow one of the three Ascension Paths and achieve Biological Mastery, give up your biological forms in a Synthetic Evolution, or unlock the full psionic potential of your species through Transcendance.
• Indoctrination: Influence primitive civilizations and make them adopt your ethics through the use of observation stations, preparing them for enlightenment or annexation.
• Advanced Slavery: Maximize the benefits of slavery by choosing specific roles for enthralled species. Have them serve other Pops as Domestic Servants, fight for your empire as Battle Thralls, or keep them as Livestock to feed your people.
• Advanced Governments: Adopt unique civics and authorities for your government. Play as a Fanatic Purifier and shun all diplomacy, become a Hive Mind to avoid political strife or create a multi-species empire born of Syncretic Evolution.

Build a Better Space Empire in Stellaris: Utopia. The stars have called you for millennia and now you walk among them. A universe of possibilities is open to your species as it takes its first fitful steps into the great unknown. Here you can turn your back on the divisive politics of the home planet. Here you can build something new. Here you can unify your people and build that perfect society.

About the base game:

Explore a galaxy full of wonders in this sci-fi grand strategy game from Paradox Development Studios. Interact with diverse alien races, discover strange new worlds with unexpected events and expand the reach of your empire. Each new adventure holds almost limitless possibilities.