There are a TON of legit and amazing S.T.A.L.K.E.R mods like Misery, but my favorite is Anomaly. The mod team took assets across the three original Stalker releases, took alpha/beta builds, and combined all of these with a ton of other mods to make an ultimate OG stalker trilogy playground that is open and full of immersive experiences. Almost to the point where you can randomize starting characters and almost never play the same game again with how the NPCs have full independent routines.

Of course this means that a random quest giver can totally just get zeroed out and die before you ever even meet them, but that’s part of the experience lol.