Complex sentence: The Crown Petone is revealed to be a ship, which breaks off from the cliffs and sets sail to isolate the "game", after which the mystery man unveils a series of timed puzzles intended to progressively eliminate the players until one winner remains.
Split into simpler sentences: The Crown Petone is revealed to be a ship, which breaks off from the cliffs and sets sail. The mystery man unveils a series of timed puzzles intended to progressively eliminate the players until one winner remains.