Just finished it on hard difficulty having concluded 3 game endings and it's a pretty good game that I don't think it got the attention it deserved!
Feeling wise it has Stalker/Metro vibe and gameplay is a mix of shooter/stealth/exloration/survival kinda game.

Pros
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+ Story + Choices + an interesting mechanism on how to affect it which haven't seen in any other game (also implemented in a lore friendly / realistic way).
+ Weapon customization
+ Characters. Interesting characters with lots of backstories on them plus combined with the choices lots of alternative paths to explore.
+ Music/Sounds. Very nicely designed to fit all scenes and places.
+ Voice Acting. I don't know russian but man it feels immersive!
+ Graphics / Atmosphere / Level Design. It really makes you feel like you are in the "Zone"
+ Base Building (nothing fancy but still)

Neutral
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~ Skills. Nice addon but could use more skills and variety.
~ QoL things missing e.g. multiple items crafting
~ Wish base stuff had more impact etc.
~ Black Boi. Nice addon but gets tiring after a while and no reward for eliminating him.
~ Some minor bugs e.g. flying objects
~ Should have made use of environmental destruction and hazards
~ Some choices make no sense e.g. having to choose between two when realistically you could have done both.

Cons
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- Enemy AI. Although not too bad, the aiming makes things quite unrealistic especially in dense bush/forest areas.
- Weapon Variety. Wish it had grenades, sniper rifle maybe some sort of grenade launcher or at least weapon variations of existing ones.
- Enemy Variety. It could easily support a bigger variety of both human and creatures.

Conclusion: Definitely worths playing and I would love to see an expansion or sequel/prequel with more stuff!

Horrible optimization. I have a GOD TIER PC and this game runs like Microsoft power point at some points and 200fps at others. The physical animations are bugged up the wazoo as well. Really a shame because this game seems neat but Its throwing me off just how many OBVIOUS issues this game has while playing it.

Its just flat out a good game. Very fun.