In 'Chrono Chums: Who's There?', players take on the role of a time-traveling ally recruited by an eccentric scientist to help fix the timeline before the universe unravels. You're thrown into various historical events, where you must interact with famous figures, solve time-sensitive puzzles, and navigate the chaos of conflicting timelines. Players choose their dialogue options, affecting relationships with historical characters while racing against the clock to correct time anomalies. As you journey through history, you'll face moral dilemmas: do you fix the timeline or let history take its course? Each decision shapes the world around you, leading to multiple endings.