Lost Hex

The Lost Hex is a mysterious, unexplored continent of Sonic's world which Sonic and his friends come across in Sonic Lost World. The Lost Hex is the main setting of the game, housing a variety of areas. Lost Hex is also home to the Deadly Six, a group of six deadly Zetis that Dr. Eggman discovers and uses to conquer Lost Hex and the Earth.

According to a Japanese trailer that shows off the boss battles, Lost Hex is a "future continent".

Areas

 * Windy Hill
 * Desert Ruins
 * Silent Forest
 * Frozen Factory
 * Tropical Coast
 * Lava Mountain
 * Sky Road

Archie Comics
The Lost Hex appears in Sonic Halloween Comic Fest 2013 and in Sonic Super Special Magazine #9 published by Archie Comics as the main location in the Sonic Lost World adaption.

In the comics, Dr. Eggman, Orbot, and Cubot find the Lost Hex after searching for an unknown period of time. Eggman and his lackey then explore the Lost Hex, as Cubot remarks that the place looks strangely similar to a familiar looking place. Suddenly, the evil trio are startled by Zavok, who questions Eggman and his lackey's appearance on the Lost Hex. Eggman then recognizes Zavok as one of the Zeti species and the two quickly challenge each other to a duel, with Eggman using his Buzz Bomber badniks to fire at Zavok.