Corkscrew loop

Corkscrew Loops, also called Corkscrew Speedways in US manual of Sonic the Hedgehog 2, are recurring level structures, that creates bridge over the huge and hollow area. Like traditional shuttle loops, the player has gain momentum for loop as the playable character can run around through corkscrew loops at high speed. If the player slows down in the mid-point of corkscrew loop, he/she falls to the hollow area below the loop. Corkscrew Loops first appeared in Sonic the Hedgehog 2.

Description
Corkscrew Loops in Sonic the Hedgehog 2 are well known level structures of Emerald Hill Zone, where they are formed over lower pathways in the Zone. To run through loops, the player usually has to get to the upper pathway. The player can easily gain momentum by running or spinning around downhill loops, which come before them. Corkscrew Loops have then made numerous appearances in later games, as they are featured at Turquoise Hill Zone and Mecha Green Hill Zone in Sonic Chaos. At the second mentioned Zone, these Corkscrew Loops go downwards on the chasms, which have bottomless pit on the bottom. They are seen briefly at Hydrocity Zone Act 2 in Sonic the Hedgehog 3, where they similarly go downwards, but are more automated. Neo South Island in Sonic the Hedgehog Pocket Adventure also has regular corkscrew loops.

Corkscrew Loops are also seen in 3D games several times, such at Speed Highway in Sonic Adventure and Radical Highway in Sonic Adventure 2. In these games, corkscrew loops are larger than in 2D games, as the player has to keep running through them to get to the other side, because usually these loops are set above bottomless pit areas.

In Sonic Advance 2, corkscrew loops are seen at Leaf Forest, where some of loop's pathway can suddenly direct down turning and then proceed the same route. In Sonic Advance 3, they are featured at Route 99, where some of them are placed over bottomless pits. They are regularly seen at Leaf Storm in Sonic Rush. Splash Hill Zone of Sonic the Hedgehog 4: Episode I also has traditional corkscrew loops. Games such Sonic Unleashed are seen grind rails formatting corkscrew loops. Tropical Resort in Sonic Colors also has large, automated corkscrew loops. Apparently, Green Hill in console/PC version of Sonic Generations also has single, large corkscrew loop, while they are also seen at Speed Highway and even at Tropical Resort and Radical Highway in Nintendo 3DS version of the game.