Knuckles can be unlocked in the same exact fashion that many players had unlocked Miles "Tails" Prower with in the stage before. In the next level, Emerald Hill Zone, players can find Knuckles' ...

In Sonic Speed Simulator, players race against their friends as their own avatars or as Sonic characters across locations from the Sonic universe, including Green Hill Zone. As they roll around at the ...

In it, Sonic runs and collects rings while different Chao characters trail behind him. The game keeps track of your level and speed as Sonic runs through an area. A few of the five planned worlds ...