 A trademark for the title Sonic Lost World was filed by Sega in May 2013 . The game was first revealed on May 17 , 2013 in a Nintendo Direct announcement , as part of an exclusive partnership between Sega and Nintendo for the Sonic the Hedgehog series . It is one of three games in this partnership , the other ones being the fourth entry to the Mario & Sonic at the Olympic Games series , and Sonic Boom , a game based on the animated series of the same name . Sega reported that more on the game would be revealed before the Electronic Entertainment Expo 2013 convention , and that the game will contain both returning and new original characters , both in enemies and friends of Sonic . On May 23 , 2013 , Sega posted a teaser , showing silhouette images of the Deadly Six , and stating that more would be revealed on May 29 . The first trailer for the game was released on May 28 , a day earlier than previously announced . 
