F.E.A.R. 2: Project OriginEdit
Failed Test Subjects are what appear to be Delta Force. They were most likely Project Harbinger candidates, probably abducted during the events of F.E.A.R. First Encounter Assault Recon. They wear the same armor as the members of Dark Signal wear.
They are seen in the Harbinger Facility, primarily in the level Withdrawal. They are laying on operating tables, much like the one Redd Jankowski was killed on, or the one Michael Becket was operated on. Becket can get closer to one in the part before James Fox ambushes him, as he is in the operating room Becket cuts through.
The Failed Test Subjects are shown torn open, sometimes with surgical equipment stabbed into their eyes. It is unknown if they were killed during the surgery required to make them Replica commanders, or if they were killed by Abominations (some doctors can be seen with similar wounds in the level Snake Fist, when Becket passes the Telesthetic Amplifier).
The Failed Test Subjects are most likely the precursor to the Abominations.