From F.E.A.R. Wiki

The Armacham Field Guide details the story of F.E.A.R. First Encounter Assault Recon, the history of Alma Wade, and the creation of F.E.A.R. 2: Project Origin. It was available to customers who reserved F.E.A.R. 2: Project Origin at Gamestop.

The guide is written by Genevieve Aristide, the president of Armacham Technology Corporation, as she muses about past events and coworkers. The guide contains a timeline of Alma's life, as well as character blurbs about the major characters and weapons of F.E.A.R. First Encounter Assault Recon and F.E.A.R. 2. Genevieve makes notes throughout the guide, such as theorizing that Alma killed Alice Wade because she may have been jealous of her.

(Updated: Replaced download links with working ones since some people had problem with accesing the files)

Armacham Technologies Assessment Briefing.pdf 837.3 MB - Full version provided by Kuno
https://mega.nz/file/rRIwFL5b#j8ditj5MDkjq0SUHe-vXh9dk2RWp5pD-q8ZFeJpwTmA

Armacham Field Guide.pdf 86.4 MB - original version (missing page)
https://mega.nz/file/LUhGQDpA#4ZYpGGBuKAdLB50umERchWEIrR1C7KwdpT9b0AHfwpI

Armacham Field Guide.zip 86.9 MB - archive with JPG images of pages
https://mega.nz/file/aUwgADRC#wY1ATs24_-_SHAx1P8PUcfHCYG-7OIVlRhrweY2fRvE

Original scans taken from princessstabbity tumblr page.
Full PDF provided by Kuno.