Dirty Past

The resource cache was indeed a deception. The real treasure lay behind a hidden door: a final message, recorded by one of the Benefactor aliens. Eons ago they were at war with a merciless alien race known as The Relentless. Entire civilizations had already perished in the Relentless' wake, and the Benefactors were next. The desperate Benefactors sought their last resort, before all would be lost. They succeeded with a device that ravaged The Relentless' neurological physique, instantaneously primitivizing an entire race. Robbed of their bloodthirsty intellect, The Relentless became docile and harmless. The Benefactors rounded them up and exiled them to our home world. The Relentless are our ancestors.

The command below will trigger the "Dirty Past" event in Stellaris:

When this event fires, you can choose between the following option:

• A bittersweet culmination.