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Blaze on one of the Hidden Islands.

The Hidden Islands are extra stages in Sonic Rush Adventure. They refer to sixteen smaller islands scattered across the Sea Chart of Blaze's world.

Overview

Like other stages in Sonic Rush Adventure, the Hidden Islands must be located on the game's Sea Chart to unlock them. However, most of them cannot be seen on the Sea Chart (hence their name), meaning that the player has to locate them without guidance. Also, while some of the Hidden Islands are required to progress with the game's storyline, most are optional stages that do not have any impact on the storyline. It is only the obligatory Hidden Islands that are visible on the Sea Chart. Upon finishing a Hidden Island, the player may unlock missions in Marine's house on Southern Island (some of which are needed to collect the Sol Emeralds and unlock Deep Core).

Each Hidden Island, except for Hidden Island 16, is a fairly short and simple stage which can be completed in less than a minute. Their gameplay also tends to focus on a certain gimmick, level layout or gameplay style. Every Hidden Island also has a "theme", which includes the background music, scenery, Badniks, and gimmicks. Many Hidden Islands borrow their theme from one of the first five stages in the game (for example, Hidden Island 9 is similar to Machine Labyrinth). Others use the exclusive "Hidden Island" theme.

Like the main stages, completing a Hidden Island will rewarded the player with Rings and Materials. Usually, Hidden Islands will give Iron or Blue Material.

List of Hidden Islands

Name Theme Materials Optionality
Hidden Island 1 Hidden Island Blue Material
Iron Material
Non-optional
Hidden Island 2 Hidden Island Blue Material
Iron Material
Non-optional
Hidden Island 3 Hidden Island Blue Material
Iron Material
Non-optional
Hidden Island 4 Coral Cave Red Material Non-optional
Hidden Island 5 Hidden Island Blue Material
Iron Material
Non-optional
Hidden Island 6 Plant Kingdom Blue Material
Green Material
Optional
Hidden Island 7 Plant Kingdom Iron Material
Green Material
Optional
Hidden Island 8 Coral Cave Blue Material
Red Material
Optional
Hidden Island 9 Machine Labyrinth Iron Material
Bronze Material
Optional
Hidden Island 10 Machine Labyrinth Blue Material
Bronze Material
Optional
Hidden Island 11 Coral Cave Iron Material
Red Material
Optional
Hidden Island 12 Blizzard Peaks Blue Material
Aqua Material
Optional
Hidden Island 13 Blizzard Peaks Iron Material
Aqua Material
Optional
Hidden Island 14 Hidden Island Blue Material
Green Material
Optional
Hidden Island 15 Haunted Ship Blue Material
Silver Material
Optional
Hidden Island 16 Hidden Island Blue Material
Green Material
Optional

Trivia


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