I loved the different gun upgrades, the scenery, the small secret tomb puzzles and the map. I think it was pretty good.
However, I had quite a lot of gripes with everything else.
The combat: it was okay, but it felt really underdeveloped. I wish there were more kinds of enemies that you could fight, instead of simple gunmen. There could have been more ways to silently take out enemies. If they leaned into it a bit more, then I think less people would have a problem with the combat in this game.
The writing: maybe its just me, but I hardly cared about most of these characters. Hell, even the main villain felt like just a random guy. And omg the constant handholding via monologues and dialogues.. can I solve ONE puzzle myself??
The pacing: the game felt very repetitive a lot of times. Running while everything explodes, sliding down something, enemies ambushing you over and over again... if all these things only happened in the first 1/3 of the game, it would have been fine. Also, a lot of times it felt like the game is going to end. But nooo, you have to collect something else from far away! I dont mind that the game is long, its just that almost every part of it seemed like its going to end in 30 minutes. In the last 2 hours, I stopped caring and speedran it.
The useless mechanics: did i miss something, or was killing animals completely useless after the first 2 hours of the game? Whats the point of being able to kill rats for example? Its not like you will ever run out of bullets, especially if you know how to do headshots.
So overall it was a fine game, and I expect a lot more from the next two. If they polished it and made it less repetitive, it could have been great.