Complex sentence: A mysterious figure appears to them over a PA system, telling them that they are on a gameshow called "Are You Scared?", and that they will have to face their deepest fears in order to win the contest.
Split into simpler sentences: A mysterious figure appears to them over a PA system and tells them that they are on a game show called "Are You Scared?". They will have to face their deepest fears in order to win the contest.