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Gigalopolis makes an appearance in Sonic Heroes 2. Here, much of the construction work has been abandoned, and it is a rotting wasteground.
Five teams play Gigalopolis. Team Sonic play it after Manic and Sonia meet them at Green Hill Zone to complain of a racket coming from the place; they lead them to the Mystic Ruins North/Gigalopolis border, and explain that it went 'down there'. Team Big play Gigalopolis en route to Crystal Egg Zone. Team Covert play it en route Electric Egg Zone. Metal Sonic of Team Badnik plays Gigalopolis with the intention of obtaining "Longarm" for Grounder, "Gloves" for Scratch and "Levitator" for Coconuts. Team Eggman visit Gigalopolis to obtain Emerl for the purposes of enmeshing.
Due it also being nocturnal and urban, Gigalopolis has drawn similarities to Star Light Zone.