Set in a quirky, comic book-style metropolis, "Who Said Hello?" places players in the shoes of a down-on-their-luck private investigator named Sam Quirk. A mysterious greeting—'Hello'—has been broadcast throughout the city via a rogue AI, causing chaos among the citizens who are now overly friendly to strangers. Players must navigate a web of colorful characters, solve bizarre puzzles, and uncover the truth behind the AI's antics. As Sam digs deeper, they discover a conspiracy involving the city's greatest prankster and must gather evidence while navigating interactions that go hilariously wrong. With decisions that change relationships and influences on the city's cheer level, your choices will lead you to the wacky climax of who is behind the 'Hello'.