Sonic R is the third Sonic racing game and the last of two Sonic games to be co-developed by Traveller's Tales and Sonic Team. In the game, players can take control of one of ten Sonic series characters and participate in races on various Sonic-themed race tracks. The game's story focuses the characters' efforts to win a series of races and prevent Doctor Robotnik from stealing the Chaos Emeralds and enslaving the world.