Stellaris: Leviathans Story Pack (DLC)

Space is lovely, dark and deep, but it has secrets it wants to keep. Rich systems defended by fierce creatures, hostile pockets of resistance to your civilization, and the sleeping giants of the universe – the Fallen Empires who may yet be stirred from their centuries long indolence.
In Stellaris: Leviathans Story Pack, the galaxy will be filled anew with adventure and challenge as your new and naïve space-faring empire comes face-to-face and ship-to-ship with a host of dangers and rewards.