Varying Effects is a note in Outlast: Whistleblower.

It is acquired by recording a Variant drowning a doctor in a toilet bowl in the Hospital.


Varying Effects
"Lisa, or whoever finds this, know that Murkoff is making monsters. I'd never seen the patients after they'd gone through that German's so-called therapy. The Engine. So much worse than I could have imagined. They may still be human, but something's been ripped out of them. And too many... other things pushed back in. They were not all murderers. They were sick, but they weren't killers. Murkoff made them monsters.
Dr. Roset said that the engine had "varying effects," the variant outcomes too erratic for any sort of prediction. I took it as idle cafeteria small talk, Raul's endless chatter. I should have listened."