|Franchise||Sonic the Hedgehog|
The area is a ruin-like maze partially submerged underwater, that features many spikes and water-driven contraptions. Despite Dr. Eggman's efforts, the greatest hazard in this zone is not the enemies or the traps, but the water. Sonic is terrible at swimming and he can only hold his breath for so long. After staying underwater for a certain amount of time, a countdown starts, at the end of which Sonic drowns. He must rely on air bubbles found at certain points underwater to reset the counter and prevent himself from death by drowning.
- While Sonic does refer to it (and remembers it) as the Labyrinth Zone from Sonic the Hedgehog (1991), its design and music make it resemble the Lost Labyrinth Zone from Sonic the Hedgehog 4: Episode 1.