Lost Labyrinth Zone is the third zone in Sonic the Hedgehog 4: Episode I. In this zone, Sonic has to navigate through three ancient trials of the abandoned labyrinth: a trial of intelligence, a trial of darkness, and lastly a trial of water. Sonic will have to be on his "S" game to survive the ancient tests: balancing on boulders, lighting dynamite, and traversing an endless assortment of waterways.