The game's lighting system serves as its primary horror instrument. Unlike conventional games where darkness merely limits visibility, Path of Exile 2 implements true darkness that becomes a tangible threat. In unlit areas, the screen doesn't simply darken—vision becomes limited to a small circle around your character, with the periphery fading into absolute blackness. This creates intense claustrophobia and the constant fear of what might be lurking just beyond sight. The dynamic torch system forces players to choose between weapon readiness and visibility, creating agonizing decisions when hearing unexplained sounds in the darkness. Monsters understand this relationship too—some will specifically target your light sources, creating moments of panic when your illumination suddenly vanishes.Sound design plays equally crucial psychological role. The audio team has implemented binaural recordings and subsonic frequencies that trigger instinctive fear responses. Certain enemy types emit low-frequency vibrations that create subconscious discomfort before they're even visible. The game occasionally employs auditory illusions—whispers that seem to come from behind the player, or footsteps that mimic your own rhythm before suddenly changing pattern. These techniques make players question what they're hearing, creating paranoia that persists even in relatively safe areas.