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It's possible to use your own music in the Windows version. Just take the CD out, and place in a music CD. Or if you prefer, another game with CD music.
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The game's title song from the US version, Sonic Boom, is included alongside other Sonic songs in Nintendo's 2008 Wii game Super Smash Bros. Brawl
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It was named CD Game of the Year in the 1993 GamePro Editors' Choice Awards (Vol. 6, Issue 2)
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Amy Rose first appeared in this video game. But, she was not created by Sonic Team. Amy first appeared in the Japanese Sonic the Hedgehog manga. She was created to chase and fall in love with Sonic. So, Sega took this character to appear in the video games series.
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In the U.S. version's manual, Amy is referred to as Princess Sally. This was most likely done to tie it in with the animated series. The only problem is: Princess Sally and Amy look completely different.
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The 1992 Sega Summer Catalogue contained this description for the upcoming Sonic CD: "Dr.Eggman is burning with the ambition of the world conquest. The peaceful world fell into chaos by Dr.Eggman and his army corps. Super hero Sonic acquired the time travel ability and he stood up to regain peace. What is ultimate weapon "DEATH EGG"? ... What is the weak point of Dr.Eggman?...From the dinosaur-age to the future, Sonic and sidekick (Debut!) begin the adventure which transcended time." The catalogue names the sidekick as ‘Tail’ (no ‘s’). But Sonic 2 was already done by the time Sonic CD was finished, so this was probably from when it was being developed as a remake of Sonic 2.
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This game was rated #27 in Electronic Gaming Monthly's 100 Best Games Ever article in EGM's January 2002 issue.
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At any point in the game, if you leave Sonic standing perfectly still (without pausing the game), after three minutes he'll say: "I'm outta here!" and race off the screen. This ends your game.
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The PC version of this game had a complete and uncut anime opening sequence. This was only ever available to PC players until it was included as en extra feature on the Sonic Mega Collection.
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This game features the first appearances of both Amy Rose and Metal Sonic, who is by far the most popular and well-known of all the Sonic robots.
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Although this was the only Sonic game ever made for the Sega CD system, it had absolutely no input from the man the series is usually attributed to, Yuji Naka.
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Chronologically, Sonic CD takes place between Sonic 1 and 2, effectively (and technically) making Amy Rose the first of Sonic's allies to show up, and Tails the second.
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The original second level of the game, which was set in castle ruins, was removed because of size and debugging issues. The end of level boss (with large claws and chompers) can be seen in the final cinema sequence during the credits.

Some of the levels elements were re-used for the Time Attack Bonus levels.
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