The Grid

The Grid is a vast computer system, created by Kevil Flynn, that appears as the basis of the Disney franchise, Tron. While it functions as a utopian technological world, where it's subjects perform unnaturaly talents, based on their code and program, the Grid appears as a digital frontier, to provide an experimental platform, at all forms, that it could be accessed. Although, protected and secured by benevolent programs, including Tron and Kevin Flynn, the Grid is shown to be frequently corrupted by malevolent programs, as well, including Commander Sark and CLU 2.0, who use the network system to their own advantage.

Regarding the villain tournaments, the Grid is displayed as a network system, controlled by the villain forces, although it plays a central role in the second Disney Heroes vs. Villains War, as one of the locations, defended by the hero resistance.