This is Tron's world. This is basically a computer program, but funtion's as a world. Tron is based off of one of the programer's working on it. One of it's main attractions is the Lightspeed bikes.
In order to play the game, you must go to the Game Grid. No one but Tron, Sora, Donald, and Goofy have ever escaped. Basically, you must knock others off their bikes in order to survive.
This world has a strange blue and gray theme. And if you enter, your body becomes gray with a blue outline. Welcome to the program.
