Tremor kept a diary in his PDA, and his last notes are the most interesting:”Recording 12. My research will be over soon... People at the camp are starting to suspect something. Grouse and Danila are planning to hunt some bloodsuckers ... I wonder when they’ll figure it out... I need to sort the jars of blood to find out which ones have been contaminated, then hide the rest... [quickly:] Someone’s coming. [the sound of the recording device being switched off, then on again]. Recording 13... possibly my last. First that nosy hunter and now Grouse... I won’t get away with this. They’ll come for me, I know it. Doesn’t really matter - this hemoglobin dependency will kill me soon anyway. And I’d rather die from a bullet than a disease...”
― In-game description
Tremor's PDA is a PDA that appears in S.T.A.L.K.E.R.: Call of Pripyat.
Acquiring[]
This PDA is carried by Tremor, and can be obtained during the mission Missing Stalkers when the player finds him in the shack at the Dock Cranes in Zaton. If the player does not question him and simply either kills him or leaves the shack (in which case he will kill himself), the player can obtain the PDA from his body.
It is necessary to complete the mission, as Beard will not believe the player without evidence, and the player will have to turn in the PDA to him to finish the mission. If the player questions Tremor and he reveals everything, the PDA won't appear and the mission can be completed by reporting in directly to Beard.