In 'Whose Hello?', you play as a linguist who has uncovered an ancient dialect that has the terrifying power to summon the dead. Set in a decaying mansion, you must decipher the meaning of eerie whispers and distorted greetings that echo through the halls. Each time you respond to a 'hello,' your sanity is tested, blurring the lines between reality and hallucination. As you unlock hidden journal fragments and confront restless spirits, your choices dictate whether you unravel the mansion's dark secrets or succumb to madness.