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The lyrics to Silver's theme, "Dreams of an Absolution", was based on songwriter Bentley Jones' relationship with his ex-boyfriend:
"Originally, I wrote "Dreams" about a bad ex-boyfriend who wanted to get back with me, and I couldn't shake off the past, and I was in this weird grey area that I didn't know if I wanted to move forward together anymore. Scandal! "Dreams" was written about a gay love story!"
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The bridge of Silver's theme in 2006's Sonic the Hedgehog, "Dreams of an Absolution", has a similarity to the original Green Hill Zone theme from 1991's Sonic the Hedgehog. Songwriter Bentley Jones has said that this was not intentional, but in retrospect he did notice it.
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During a cutscene where Sonic, Tails and Knuckles walk through a ruined hallway in the future, Knuckles' model can be seen collapsing into a ragdoll slightly off screen.
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During the final cutscene of the game, Spoiler:Sonic rushes past Elise, which then causes her to look around. After not seeing anything, one of the girls behind her asks "Miss Elise?". Although Elise replies "It felt like... someone was calling me," the subtitles accidentally include an extra "like" in the sentence.
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![Attachment](/media/thumbs/5/10761.png)
GameSpy: Did the people at Sega tell you why they wanted you for this role?
Lacey Chabert: They just told me that they thought my voice was appropriate for the character.
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In the cutscene "Rouge returns to the present", Rouge receives a message from a soldier at GUN HQ with the line "Report your status immediately. Have you retrieved the Scepter of Darkness?". While the subtitle is correct, the voiceover actually refers to it as the "Book of Darkness".
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![Attachment](/media/thumbs/4/8668.jpg)
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Yuji Naka, former head of Sonic Team, lead programmer on the original Sonic the Hedgehog, and Executive Producer of the 2006 game also titled Sonic the Hedgehog, resigned shortly after it was unveiled at E3 2005.
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Each of the supporting characters have unused audio instructing Sonic, Shadow and Silver how to defeat each enemy. One example is Knuckles instructing Sonic on how to defeat an Iblis Golem enemy.
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![Attachment](/media/thumbs/3/6179.png)
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Despite going through the same parts of Flame Core at the same time, Sonic and Shadow are not playable in each other's episodes. However, there are unused sound files that suggest that they were going to team up, with Shadow driving a vehicle while Sonic takes out enemies.
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The word Iblis, which is used as the name for one of the game's bosses, is an Arabic word (بليس: Iblees) which translates as 'devil'.
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There is an unused multicolored gem in the game's data called the Rainbow Gem. This gem would have let the character "go super" at any time they wanted. If it is hacked back into the game, the character would go through the Super transformations animations, but would be unable to turn into the Super mode.
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![Attachment](/media/thumbs/2/2534.jpg)
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In Shadow's story, after you ignite the flames around the fountain in Soleanna City and receive the Sceptre Of Darkness, you'll receive a message from GUN HQ that will tell you where you have to go next. The dialogue in the message contains 2 takes from the voice actor, the first take being a failed attempt. It seems that it was accidentally left in the game.
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Throughout Sonic's story, there are Gems that gradually become available for purchase from the shops which grant Sonic abilities such as slowing down the environment around him, giving Sonic a burst of speed and even allowing him to throw the Gem in a grappling hook-like fashion. These are supposed to drain his meter in the bottom right-hand side of the screen (which works properly for Shadow and Silver), but due to programming errors, they don't do anything. As such, it is incredibly easy to exploit your way past disliked sections of stages.
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Story-wise, this is the only game in the series to feature a villain who succeeds in killing Sonic, albeit soon followed by his revival.
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