Penal Graveyard

… has unlocked the entrance of the mining complex on …. Inside, a vast network of holding cells contains the vacuum-preserved remains of long-dead prisoners. Their apparent captors lay dead at their workstations with no visible signs of struggle. After decrypting enough of the ancient language to translate rudimentary phrases, we have confirmed that the facility originally functioned as a penal labor camp. A common phrase is repeated throughout the records referring to an entity known as "S.I.D.N.I.". By referencing our communications equipment against the facility's internal floor plan, we have identified the source of the distress signal as the warden's office located deeper within.

The command below will trigger the "Penal Graveyard" event in Stellaris:

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

• Follow the signal.