Sonic Racing series

The Sonic Racing Series began on the Sega Game Gear, and has since spawned four games in the US.

Sonic Drift 2
This game was the first Sonic racing game released in the US. The first one was a Japan-exclusive until it was included on Gamecube compilations years later. It was released to the Sega Game Gear and features Sonic, Knuckles, Eggman, Metal Sonic, Tails, and various other Sonic characters racing in karts. Due to the space limit for names, Knuckles name was misspelled as "Knucles".

Sonic R
This game was released for both the PC and the Sega Saturn. It featured a fully 3D interface with broadly detailed racetracks, complete with shortcuts either by skipping the normal part of the track or opening a door after collecting a certain amount of rings. Unlike Sonic Drift 2, Sonic R involved footracing. The characters involved included Sonic, Tails, Knuckles, Metal Sonic, Super Sonic, Amy, and Eggman. A secret character known as Tails Doll was also included.

Sonic Riders
This game was released to the Gamecube. In keeping with the tradition of the Sonic Racing Series, this game features a new racing style, this time on hoverboards. A sequel was released known as Sonic Riders: Zero Gravity, the first time since Sonic Drift 2 that a game in the series was given a sequel and the first time the sequel was released in the US.