Desert Ruins is a level in Sonic Runners that was available as part of a special event, complete with its own special episode.
Based on the level of the same name from Sonic Lost World, Desert Ruins is set in a generic desert with pyramids and cacti across the landscape. As an event stage, Desert Ruins was suitable for all three types of characters, featuring the same kinds of obstacles found in Windy Hill, Sky Road and Lava Mountain.
Team Sonic discovers a fragment of the world of the Arabian Nights above their world and decide to search for treasure there. Along the way, they discover that Erazor Djinn has been freed, but got split into a thousand weaker pieces which Dr. Eggman, who has taken King Shahryār's place, is gathering one hundred of to form a super-djinn to take over the world with. Team Sonic employ Eggman's strategy against him to foil his plans and restore Shahryār to the throne.