Sonic Heroes

Sonic Heroes is a 2003 3D platform game developed by Sonic Team USA and published by Sega as part of the Sonic the Hedgehog series. The player races a team of series characters through levels to amass rings, defeat robots, and collect the seven Chaos Emeralds needed to defeat Doctor Eggman. Within each level, the player switches between the team's three characters, who each have unique abilities, to overcome obstacles.

Plot
While running around on his own, Sonic meets Tails and Knuckles in the Tornado 2. They reveal that they have received a letter from Dr. Eggman telling them of a new ultimate weapon that will be ready within three days to help the doctor conquer the world, and that he challenges them to stop him. Sonic, competitive as ever, accepts the challenge. Tails is disturbed by the message and unsure of what will happen, while Knuckles is confident that there is nothing to worry about. Sonic, however, tells them that he would not miss this adventure and the three heroes band together once again to foil Eggman's plans.

Sonic
The world's fastest supersonic hedgehog unrivalled in speed returns once more. Always the drifter, Sonic goes whenever the wind takes him, and lives life according to his own rules rather than the standards of those around him. He's basically easy-going, but when he gets fired up over an injustice, his anger explodes with surprising consequences. Always at the receiving end of this aggression is arch-enemy Dr. Eggman, whose fiendish ploys to take over the world are constantly being foiled by Sonic. Saving the world is a nice distraction, but Sonic is soon off to find his next adventure.

Gameplay
The game introduces several new gameplay elements. Unlike most Sonic games, where players control one character, three characters are available at any time to choose from, as the player may switch the party's leader freely, whilst the other two characters follow behind.[18] Each character has an individual ability: Speed, for clearing stages fast; Power, for breaking objects and combat; or Flight, for reaching higher platforms. Each ability is also represented in the interface by color, with blue for Speed, yellow for Flight, and red for Power. These also have elements associated with them, with Speed using wind, Fly using lightning, and Power using fire.