Sonic - Lost World (USA) (Japanese title: ソニックロストワールド) is an action-adventure platformer game released by Sega in 2013 for the Nintendo 3DS. The game follows Sonic the Hedgehog as he attempts to stop the evil Dr. Eggman's plans to take over the world. Sonic must use his speed, agility, and special abilities to traverse a variety of levels and defeat Eggman's minions. Along the way, he'll encounter a variety of obstacles, enemies, and bosses. Players can also collect items to help them progress through the game. Sonic - Lost World features a variety of levels, each with its own unique set of challenges and enemies. In addition, the game also offers a variety of bonus levels and mini-games, as well as an online multiplayer mode. Sonic - Lost World is a fun and challenging game that is sure to please fans of the classic Sonic series.