If you are trying to source the game safely, your best option is to search for legitimate, second-hand physical copies (such as Japanese DVD-ROM imports) on trusted collector or auction sites like technical help

You explore various sets including classrooms, parks, swimming pools, and even a red-light district.

He restarted the scene. This time, the hallway was pitch black. His avatar held a dim flashlight that barely cut through the gloom. As he walked, the sound of footsteps echoed behind him—not his own. He turned his character around, but the hallway was empty. Then, a message appeared in the center of the screen: "Darkness Exclusive Mode Activated."

: Explore all available sets, such as the rooftop and the infirmary, to trigger different character events. technical installation steps for the game? Premium Play Darkness: Gameplay - Hgames Wiki