I can agree, some of the media we use is nicer than that in fear, and also some of us have more of a flair for light colour grading than certain parts of FEAR did, but this does not really make them similar.
I would agree a game in the art/graphics style of early 2000s shooters would be highly possible in gameguru or FPSC, however a game similar in "length" or "enjoyment of basic gameplay" of the more famous of them, you would find nigh impossible to create
what do I mean when I say "fluidity"
check out this article to have my explaination. Big-time game engines are optimized in a way gameguru simply isn't, allowing them to create a more "fluid" experience for the player with less hiccups, at any frame rate. This becomes increasingly apparent when a level that is actually the size of a 2000s first person game is put in gameguru.
so this might sound pessimistic, definitely not optimistic, but i just want to be realistic.
You can, using GG, create a game that LOOKS like FEAR or another early 2000's shooter of a similar style
but:
the levels will be 1/3 as long
the game won't be 1/10th as long
the frame rate will be lower and less fluid
the AI will not be as good
it will take 4x as long to load
and it will simply lack a lot of the normal creature comforts we've come to expect from games that are part of the reasons why these games are considered so "good"
so old timer, i reiterate, i'd suggest setting your sights the first game you make at very least on something you've seen made and successfully built in game guru before. If you havent tried any gameguru games, you don't know if you are gonna enjoy the gameplay, so you might want to try them because more likely than not, that's what your game will "feel" most like.
you said you played redacted, I suggest playing Cold Contract, Kshatriya Wetwork, Redacted 2, and Resist Revolution. The gameplay similarities and idiosyncrasies that you find will likely be in your game too. If you're looking to make something longer or more fluid, you might consider looking elsewhere. If you're looking for something that isn't plagued with the exact same problems FPSC was, you might consider looking elsewhere.