In 'Nightmare Exchange: Whose Dream Is It Anyway?', players assume the role of an unwitting dreamer who stumbles into a bizarre marketplace of nightmares. Each 'stall' is a unique nightmare that belongs to different characters who have their own stories and eccentricities. Players interact with these characters, barter for the weirdest nightmares, and try to figure out how to escape this nightmarish bazaar while also uncovering the hidden truths behind each character's fears. As choices impact the outcome, the player must navigate through humorous yet chilling dialogues and eerie, shifting dream environments, all while collecting 'nightmare souvenirs' that give them unique abilities. The ultimate challenge is to confront their own worst nightmare, which they inadvertently brought into the marketplace. Will they wake up unscathed or forever be trapped in the realm of dreams?