DescriptionSonic 20th Anniversary celebrates the anniversary of the release of
The app's biggest attraction is the game Sonic the Sketchhog, whose international release was exclusive to this app. A simple infinite runner, it features a sketchy hand-drawn Sonic running through a cute rendition of Green Hill Zone set to a relaxing music box rendition of the first stage theme from Sonic the Hedgehog 4: Episode I. The player is scored based on the number of metres travelled, the number of rings collected, and the number of enemies defeated; an online high score list allowed players to compare their high scores with their friends.
The app's other primary gaming feature is a one-level time-limited demo of Sonic the Hedgehog 4: Episode I, which had been released the previous year. It also featured weekly free downloadable wallpapers and a news feed featuring news about Sonic's 20th anniversary.
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