In 'Chrono Chums: Who's There?', players take on the role of an eccentric time-traveling investigator who must solve an interdimensional mystery. After receiving a cryptic message from their past self, they must gather a ragtag team of historical 'chums'—famous figures from different eras, like a cheeky Cleopatra and a snarky Nikola Tesla. Together, they'll navigate through bizarre timelines, confront paradoxes, and chase down a villain who aims to rewrite history for their own gain. Each choice affects the timeline, leading to multiple endings and showcasing the importance of friendship across time.