This trainer works for Steam on F.E.A.R.
Not sure about Perseus Mandate or Extraction Point as I haven't tried those with this yet, but if it's working on this version, I would imagine it would.
To be clear, I claim no credit for making this trainer. Only for making an English readme for it.
Here is the link.
[Edited by Zeikar, 11/24/2015 10:06:52 PM]
[Edited by Zeikar, 11/24/2015 11:50:12 PM]
* Updated game trainers and cheats daily
* Get notified when new cheats are added
* Request which games get new trainers
* Priority support with any problem
• Unlimited Items and Ammo
• Unlimited Health