The Splitter is one of the Collectibles found in Alan Wake's American Nightmare. It is one of the pages of the Return manuscript.
Manuscript text[]
Some of the Taken aren't protected by the darkness like their comrades. Instead, their aversion to light is so extreme that they literally split into two when they encounter strong light. It leaves the two halves weaker, but of course there's strength in numbers.
It's a disturbing development; the Dark Presence I faced two years ago was powerful, but it didn't have much in the way of imagination. Clearly, the same cannot be said of Mr. Scratch.
Location[]
This page can be found on a rock behind the trucks parked in front the gas station.