Sonic R is a 1997 racing video game developed by Traveller's Tales and Sonic Team for the Sega Saturn. It is the third racing game in the Sonic the Hedgehog series, and the first to feature 3D computer graphics. The player races one of ten Sonic characters in various Sonic-themed race tracks as they attempt to stop Doctor Robotnik from stealing the Chaos Emeralds and enslaving the world. Sonic R features single-player and multiplayer game modes, and while similar to kart racing games such as Mario Kart, it places an emphasis on jumping and exploration. By collecting items and completing objectives, players can unlock secret characters.