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Concept artwork
Logos
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    PSD version without white background.  |
Add a photo to this galleryBox cover
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 Conceptual cover artwork.  Early promotional cover artwork.  Later promotional cover artwork.  |
Characters
Sonic the Hedgehog
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 Sonic model in wireframe.          A test animation of Sonic running in an isometric, 3/4 view.  Sonic with a Santa Claus hat, possibly in relation to the game's unfinished Christmas level. |
Miles "Tails" Prower
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Knuckles the Echidna
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  A test animation of Knuckles running in various positions.  A test animation of Knuckles playing from an overhead perspective. |
Tiara Boobowski
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 The initial Tiara sketch.  The base Tiara design.              A test animation of Tiara's original method of play, the classic side-scrolling view.  The final design of Tiara, revealed. |
Amy Rose
Enemies
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            Bomber concept     Concept artwork of Snooter.   Concept artwork of Snooter.   Concept artwork of Flamedome  Concept artwork of Ribbot  Concept artwork of Ribbot  Concept artwork of Ribbot  Concept artwork of Litebug    Concept artwork of Piranha  Concept artwork of Litebug  Test animation for Purplebot  A test animation for a "Spinner" enemy.  Concept artwork of Trunkbot.  Concept artwork of Ball Drone.  Various early concept artwork by Chris Senn.  Concept of RiskStar.  An early enemy design meant for Tiara Boobowski when she was considered as a playable character.  Concept artwork of Floppy.  Cappy concept  Concept artwork of Gyro  T-Rex |
Bosses
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 Mecha Sonic Mark I concept  Mecha Sonic Mark II concept  Mecha Sonic Mark III concept  Mechasonic Type III concept  Mechasonic Type III concept   Mecha Sonic Mark IV concept  Mecha Sonic Mark IV concept  Mecha Sonic Mark V concept  Mecha Sonic Mark V concept  A rough outline of a possible encounter between Sonic and Mecha Sonic.  Concept for the boss of Jade Gully Zone, "Emerald Cat".  Concept for the boss "Flame Falcon".  A rough outline of the Flame Falcon boss fight.  A continuation of the Flame Falcon boss fight.  Concept for the boss "Mecha Mite".  A rough outline of the boss encounter with Mecha Mite.  Concept for the Guardian Sphinx Boss.  Concept for the boss "Football".  Concept for the boss "Octopod". |
Levels
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 Level concept  Level concept  Concept of Crystal Frost Zone.  Concept of Crystal Frost Zone.  Concept of Crystal Frost Zone.  Concept of Crystal Frost Zone.  Concept artwork of Jade Gully Zone.  Concept artwork of Jade Gully Zone.  Concept artwork of Jade Gully, including the "Emerald Cat" boss and creatures called "Mips".  Concept artwork of Jade Gully.  Concept artwork of Death Egg Zone   Grass Texture  Level concept      Level concept  Level concept   Level concept. By Ofer Alon.  Level concept |
Don Goddard script
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 Don Goddard's game script, page 1.  Don Goddard's game script, page 2.  Don Goddard's game script, page 3.  Don Goddard's game script, page 4.  Don Goddard's game script, page 5.  Don Goddard's game script, page 6.  Don Goddard's game script, page 7.  Don Goddard's game script, page 8.  Don Goddard's game script, page 9.  Don Goddard's game script, page 10.  Don Goddard's game script, page 11.  Don Goddard's game script, page 12.  Don Goddard's game script, page 13.  Don Goddard's game script, page 14. |
Storyboards
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 Storyboard for an animated version of the Sega Technical Institute logo.  The title card to an act of Red Sands Zone, named "Giza Speedway."  The last panel of the previous storyboard in full color.  The first page of one possible opening sequence.  The second page of one possible opening sequence.  The third page of one possible opening sequence.  The fourth page of one possible opening sequence.  The fifth page of one possible opening sequence featuring the only known concept of Gazebo Boobowski.  The Sixth page of one possible opening sequence.  An early attempt at an introductory FMV. |
Hirokazu Yasuhara's sketches
Near the tail-end of development for Sonic X-treme on the Sega Saturn, Hirokazu Yasuhara was asked by Sega of America to help with the project. His concepts were used during the "Project Condor" phase of the project before its discontinuation:
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 "The System of Sonic World," laying out the flow of the game.  The flow of Jade Gully Zone.  The flow of Crystal Frost Zone.  The flow of Candy Mountain Zone.  The flow into Red Sands Zone.  The layout to enter the Death Egg Zone.  Zone 1, Act 1, page 2.  Notes to Zone 1, Act 1, page 2.  Zone 1, Act 1, page 3.  First set of notes to Zone 1, Act 1, page 3.  Second set of notes to Zone 1, Act 1, page 3.  Zone 1, Act 1, page 4.  Notes to Zone 1, Act 1, page 4.  Zone 1, Act 1, page 5.  Notes to Zone 1, Act 1, page 5.  Zone 1, Act 2, Page 1.  First set of notes to Zone 1, Act 2, page 1.  Second set of notes to Zone 1, Act 2, page 1.  Zone 1, Act 2, page 2.  Notes to Zone 1, Act 2, page 2.  Zone 1, Act 2, page 3.  Notes to Zone 1, Act 2, page 3.  Zone 1, Act 2, page 4.  Notes to Zone 1, Act 2, page 4.  Zone 1, Act 2, page 5.  Notes to Zone 1, Act 2, page 5.  Zone 1, Act 3, page 1.  Notes to Zone 1, Act 3, page 1.  Zone 1, Act 3, page 2.  Notes to Zone 1, Act 3, page 2.  Zone 1, Act 3, page 3.  Notes to Zone 1, Act 3, page 3.  Zone 1, Act 3, page 4.  Notes to Zone 1, Act 3, page 4.  Zone 1, Act 3, page 5.  Notes to Zone 1, Act 3, page 5.  Zone 2, Act 1, page 1.  Zone 1, Act 1, page 2.  Second set of notes to Zone 2, Act 1, page 1.  Zone 2, Act 1, page 2.  Notes to Zone 2, Act 1, page 2.  Zone 2, Act 1, page 3.  First set of notes to Zone 2, Act 1, page 3.  Second set of notes to Zone 2, Act 1, page 3.  Zone 4, Act 1  Zone 4, Act 2 Zone 5 concepts |
3D Models
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Miscellaneous
Sprites
Enemies
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 Hi-res version of Sweep. From PackageX.  Unknown enemy for unfinished Christmas stage. From PackageX.  Unknown enemy for unfinished Christmas stage. From PackageX.  Unknown enemy for unfinished Christmas stage. From PackageX.  Unknown enemy for unfinished Christmas stage. From PackageX.  Unknown enemy for unfinished Christmas stage. From PackageX.  Unknown enemy for unfinished Christmas stage. From PackageX.  Unknown enemy for unfinished Christmas stage. From PackageX.  Unknown enemy  Unknown enemy  Hi-res version of unknown enemy. From PackageX. |
.gif "Snooter (1).gif (14 KB)")
Sonic
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Miscellaneous
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 Sonic Orb from PackageX  Thunder Shield from PackageX  Unknown creature for Christmas level. From PackageX.  Unknown creature for Christmas level. From PackageX.  Unknown creature for Christmas level. From PackageX.  Unknown creature for Christmas level. From PackageX.  "Merry Xmas" sign for Christmas level. From PackageX.  "Merry Christmas" sign for Christmas level. From PackageX.  Sign for Christmas level. From PackageX.  Unknown object from PackageX  Unknown object from PackageX  Unknown creature for unfinished Christmas stage. From PackageX.  Fan from PackageX  Unknown object from PackageX  Speech bubble for unfinished Christmas stage. From PackageX.  Speech bubble for unfinished Christmas stage. From PackageX.  Speech bubble for unfinished Christmas stage. From PackageX.  Speech bubble for unfinished Christmas stage. From PackageX.  Speech bubble for unfinished Christmas stage. From PackageX.  Speech bubble for unfinished Christmas stage. From PackageX.  Speech bubble for unfinished Christmas stage. From PackageX.  Speech bubble for unfinished Christmas stage. From PackageX. |
Screenshots
Jade Gully Zone
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 Jade Gully Zone  Tech demo                            |
Red Sands Zone
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Crystal Frost Zone
Galaxy Fortress Zone
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Death Egg Zone
Blue Ocean Zone
Test levels
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Unknown levels
Boss Arenas
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Magazines
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 Intellogent Gamer (June 1996)  EGM (US) (May 1996), pg. 105  EGM (US) (October 1996)  EGM (US)  Game Players (US) (June 1996), pg. 38  Game Players (US) (June 1996), pg. 39  Game Players (US) (June 1996), pg. 40  Game Players (US) (June 1996), pg. 41  Game Players (US) (July 1996), pg. 42  Game Players (US) (July 1996), pg. 43  Game Players (US) (July 1996), pg. 44  Game Players (US) (September 1996), pg. 52  Game Players (US) (September 1996), pg. 53  Game Players (US) (September 1996), pg. 54  Game Players (US) (September 1996), pg. 55  Sega Saturn Magazine (UK)  EGM (US) (March 2001), pg. 96  Unknown magazine  Unknown magazine (August 1996)  Unknown magazine  Unknown magazine  Unknown magazine  Chip & Bits  Mean Machines Sega (UK) (July 1996), cover  Mean Machines Sega (UK) (July 1996), pg. 26  Mean Machines Sega (UK) (July 1996), pg. 27  Sega Saturn Magazine (UK) (July 1996), pg. 32  Sega Saturn Magazine (UK) (July 1996), pg. 33  Archie Sonic Comic Order Form (#44 to #51, March 1997 to October 1997)  Archie Sonic Comic Sonic Grams #44 (March 1997) |
Miscellaneous
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| Characters | Sonic | Tails | Knuckles | Tiara | Gazebo | Mips | Dr. Robotnik | Fang | Metal Sonic | Guardian Sphinx Boss | |
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| Zones | Castle of Light | Crystal Frost Zone | Death Egg Zone | Galaxy Fortress Zone | Jade Gully Zone | Metal Blade Zone | Red Sands Zone | Blue Ocean Zone | |
| Enemies | Ball Drone | Beebot | Bomber | Bonehead | Boy | Buzzsaw | Cappy | C-Grinder | Cog | Crab | Dingo | Dynobot | Feep | Fishee | Flamedome | Flame Spinner | Floppy | Gyro | Jetarang | Litebug | Loball | Octopod | Orca | Pin Tut | Piranha | Purplebot | Ribbot | RiskStar | Sjax | Snooter | Skuzzy | Tri Drill | Trunkbot | |
| Other | Chaos Emerald | Debug Mode | Master Emerald | Ring | Rings of Order | Sonic Orb | SonicBoom | Spin Slash | |
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