Stellaris: Utopia expansion lets you build Dyson spheres, ringworlds

Paradox has announced the first major expansion for Stellaris, its intergalactic PC empire-building game.

Titled Utopia, the add-on brings new varieties of space facility, Ascension Perks that let you decide how your civilisation evolves, and the option to divide your citizens up into race-specific castes with different rights and privileges, if you’re in the mood to sow a little social discord.

The new space stations include enormous habitats that may stand in for planets when good old-fashioned solid ground is scarce. You can also build megastructures such as Dyson spheres (think giant hollow planet with a sun at its centre) and ringworlds (think Halo).