You can find more details and the download link for this mod on the Oka-Senpai's Mods page at Yandere Simulator Fanon Wikia. Oka-Senpai's Mods - Yandere Simulator Fanon Wikia

: While many zombies are easily fooled, "smart" variants can sense your heartbeat if you get too close.

: The mod shifts the tone of the game toward horror, focusing on survival amidst the undead while still completing traditional mission objectives. Visual Assets & Examples

: The core mechanic requires you to appear as "one of them" to complete missions.

: Players can manually control the density of the zombie horde. For an increased challenge, pressing the 'Z' key repeatedly for several seconds will significantly increase the number of spawned zombies.