Sonic Gems Collection (ソニック ジェムズ コレクション Sonikku jemuzu korekushon?) is a video game compilation developed by Sonic Team and published by Sega in 2005 for the Nintendo GameCube and PlayStation 2. It compiles more obscure Sonic games than Sonic Mega Collection/Plus in addition to the six Sega Game Gear that were not featured in the aforementioned compilation.
- Sonic CD (PC port)
- Sonic the Fighters (Arcade)
- Sonic R (PC port)
- Sonic the Hedgehog The Screen Saver (A part of the museum)
Game Gear games
- Sonic the Hedgehog 2 (8-bit)
- Sonic Spinball (8-bit)
- Sonic the Hedgehog Triple Trouble
- Sonic Drift 2
- Tails' Skypatrol
- Tails Adventure
Unlockable games in all regions:
Unlockable games exclusive to Japan:
- Bonanza Bros.
- Bare Knuckle (Streets of Rage)
- Bare Knuckle II (Streets of Rage 2)
- Bare Knuckle III (Streets of Rage 3)
In the Museum, a number of classic Sonic games can be unlocked. When selected, the player starts on the game's final Boss and has a time limit. If the player wins the game under the time limit, they can continue playing from the beginning of the game until the time runs out.
- Sonic the Hedgehog (16-bit)
- Sonic the Hedgehog 2 (16-bit)
- Sonic the Hedgehog 3
- Sonic & Knuckles
- Sonic 3D Blast
- Sonic the Hedgehog Spinball (16-bit)
- Dr. Robotnik's Mean Bean Machine (16-bit)
Game Gear games:
- Sonic the Hedgehog (8-bit)
- Sonic Chaos
- Sonic Blast
- Sonic Labyrinth
- Sonic Drift
- Dr. Robotnik's Mean Bean Machine (8-bit)
- Knuckles' Chaotix
- SegaSonic the Hedgehog
- Sonic Eraser
- Wonder Boy III: Monster Lair
- Monster World IV
- Wonder Boy V: Monster World III
Sonic Gems includes a museum of unlockable content such as artwork, videos, music tracks and game demos (listed above).
- Artwork from Sonic the Hedgehog CD
- Artwork from Sonic the Fighters
- Artwork from Sonic R
- All of the images featured in Sonic the Hedgehog The Screen Saver
- Artwork from Knuckles' Chaotix
- Screenshots of Sonic Adventure DX: Director's Cut
- Screenshots of Sonic Adventure 2 Battle
- Screenshots of Sonic Heroes
- Modern character artwork
- Promotional holiday artwork
- Photos of Japanese Sonic arcades such as Waku Waku Sonic Patrol Car
- Original concept art.
- Sonic Gems original artwork
- Gems Museum (Theme)
- Are You Brave?
- Fairy Of A.I.F.
- Sonic 6290 Mix
- Sonic After-6290 Mix
- Sonic Boom D'nB Mix
- Can You Feel The Sunshine ACID Mix
- Living In The City LTN Mix
- Sonic Goes UG Mix
- Sonic 3 MegaD Mix
- Open Your Heart MJZ Mix
- Sonic Heroes No-GTR Mix
- Sonic Heroes teaser Video
- Sonic History Video
- Sonic Adventure intro. video
- The PS2 version is region-locked so that it plays the original soundtrack of Sonic the Hedgehog CD on a Japanese system; if it detects another region (even European), it defaults to the American soundtrack, and there is no in-game music selection. This is not the case for the GameCube release, which may have been done to save space.
- The version of Sonic R in the GameCube release supports up to four players, whereas the PlayStation 2 version only supports up to two players.
- SegaSonic the Hedgehog
- Sonic Eraser was also initially planned, but did not for unknown reasons. Furthermore, three Mega Drive games from the Wonder Boy Series were also planned, but did not make it for unknown reasons.
- Two of the games not included (Sonic Eraser and Monster World IV) have a different color for the "MD" Symbol (The original "MD" is pink\purple, while the other is orange\red). No one knows for sure why they have different colors, but some people believe it's because Sonic Eraser and Monster World IV were only released in Japan.
- Knuckles' Chaotix was originally planned to be included, but wasn't due to the difficult nature of emulating the 32X software.
- The song Sonic 3 MegaD Mix was included in the album, True Colors: The Best of Sonic The Hedgehog Part 2, unedited.