Indications of the Point Man possessing superhuman physical resilience in F.E.A.R. 1
So the original 2005 game indicates several times that the Point Man possesses superhuman physical resilience.
In chronological order, its when he first personally encounters Alma at the harbor area and she blows him out the window. And Jin says about the effect of the explosion on him: "He doesn't appear to be injured. Although I don't know how he survived.". Not just surviving but also uninjured. Also a Delta operator tells the Point Man: "You're lucky to be alive."
Next, the Point Man is riding in a helicopter with Jin and Doug Holiday on route to the Origin Facility when the helicopter is struck and crashes. Holiday says that the Point Man "looks okay" which is in contrast to the others.
For Holiday himself, "it'll be a while before I can ice skate again", and he says that Jin is "banged up pretty bad" while the helicopter pilot has been killed.
In both times the Point Man is well enough to continue fighting and Rodney Betters orders him to do so.
Also, at the end the Point Man is caught in the explosion of the reactor of the Origin Facility, and is found in the rubble by Jin and Holiday, and Holiday remarks to the Point Man: "I don't know how you lived through that."
All these times viewed together indicate that when the Point Man made it, it was due to himself possessing superhuman physical resilience.
And this might also explain the Replicas being able to take lots of bullet damage, they too might possess superhuman physical resilience.