The Scream
Cause
The true cause of the Scream is unknown. No existing documents refer to similar events, no lab has breached true faster-than-light travel, and no psionics testing has devised anything resembling the effects of the Scream. The prevailing theory, despite the lack of concrete evidence, is that the instigating event occurred in and traveled through metadimensional space. This would explain why it only affected people and objects tied to metadimensional energies through psionics. Religious groups have filled in the blanks scientific theory has left in its wake. Though there are hundreds of recognized religions in the sector, and thousands of sects within each, the two primary ones are sects of the Church of the Great Mother. Both groups believe the Scream relates to the Great Mother.Effects
Hundreds of documents exist that describe the immediate effects of the Scream. However, the only first-hand accounts are from non-psions. No psion who experienced it lived to explain what the sensation was like to them, so those details can only be ascertained second-hand, through archived security footage that captured the moment or through descriptions from non-psionic survivors. The estimated death toll is in the trillions, not just for the psions immediately killed, but those killed by feral psions, psitech failures, and colony collapse as supply lines disappeared and support systems couldn't be maintained.Audio
Psions across the galaxy clutched their heads and blocked their ears in unison, as if subject to an ear-piercing screech. No recordings or first-hand accounts capture any such sound, outside of the screams of pain from those suffering.Visuals
The Scream itself would only register to metapsions or similarly-enhanced equipment. All others only saw psitech suddenly malfunction, overload, or crumble under the surge of metadimensional energy.Physical Effects
It's theorized the scream opened every MES channel in psions' brains for a surge of metadimensional energy that was too powerful for the human brain to handle. It killed many psions near-instantly, leaving portions of their brains liquified. Others turned "feral" and attacked anyone around them.Long term
This is a placeholder for a future article block about the Silence
Many cultures developed a deep fear of psionics, especially those that previously had a high psionic population. These cultures destroyed any material relating to psionics, contributing to the current lack of information.
Psitech remains unachievable. Existing psitech locations that were easy to get to have already been picked clean of anything they offer, leaving the worst places to pirates and other questionables like the Syndicate.
Means of inter-stellar travel has been recreated, but passing information between systems can take days and ships can take weeks. This sector is just a fraction of the thousands of human colonies that once existed.
This is an expansion on the concept of the Scream as depicted within the Stars Without Number rulebook. I claim no ownership of the concept, only this specific interpretation and how it has affected this setting.
Oh wow what a massive and shattering experience. This feels like the opening to a series, movie or book. Happy world building during Summer Camp.
It's a great plot device and I'd love to explore it more. I could base an entire campaign around uncovering the true cause and stopping it from happening again. Hope you are also having a good Summer Camp!