Cloud City is a series of magnetically levitated structures, weighing in excess of 200,000 tons, created by the Infinite Empire in a bid to escape Earth. Although only one city is seen ingame, an unknown number of other Cloud Cities presumably exist throughout the world as well. The Cities are composed of two main levels: the central, upper levels that house the technocrats, and the outer, lower levels where the workers live, as well as where deliveries, manufacturing, refining, and waste disposal take place. A significant majority of these lower levels are dedicated to the refinement of link fluid in order to sate the elites on the upper floors, as evidenced by the countless crates and barrels filled with the red liquid, as well as the long stretches of piping. The lower floors are occupied mainly by robots, although the security guards and dock workers are at least partially human.
Content from Cloud City that did not make it into the final game includes fire weapons, a turret enemy called Sullu, and a blob boss.