The AI behavior of NPCs in STALKER is what makes me want to play it again and again.

One of the best part about the AI in STALKER is that it makes the game world feel alive. NPCs have their own objectives and can 'think' for themselves, react to what’s happening, and interact with the world in ways that don't feel scripted.

This keeps the game unpredictable, making it feel more believable. It makes you feel like you’re a part of a bigger world. That it doesn't revolve around you.

I believe it’s this dynamic and unpredictable behavior that makes the so engaging and makes players come back to it.

I think both casual or hardcore players can agree on this.

STALKER is really about the adventure, not about the wishgranter.

"Maybe the real loot was the stalkers we met\killed along the way".