Sonic Gems Collection

Sonic Adventure DX Artwork Set 1: Play Sonic Spinball five times
Sonic Adventure DX Artwork Set 2: Play Sonic Spinball ten times
Sonic Adventure DX Artwork Set 3: Accumulate a total of one hour of game play time in Sonic Spinball
Sonic Adventure DX Artwork Set 4: Accumulate a total of two hours of game play time in Sonic Spinball
Sonic CD Artwork Set 1: Play Sonic CD five times
Sonic CD Artwork Set 2: Play Sonic CD ten times
Sonic CD Artwork Set 3: Accumulate a total of one hour of game play time in Sonic CD
Sonic CD Artwork Set 4: Accumulate a total of two hours of game play time in Sonic CD
Sonic Championship logo: Successfully complete Sonic: The Fighters
Sonic Heroes Movie Artwork Set 2: Play Tails Adventure ten times
Sonic Heroes Movie Artwork Set 3: Accumulate a total of one hour of game play time in Tails Adventure
Sonic Heroes Movies Artwork Set 1: Play Tails Adventure five times
Sonic R Artwork Set 1: Play Sonic R five times
Sonic R Artwork Set 2: Play Sonic R ten Times
Sonic R Artwork Set 3: Accumulate a total of one hour of game play time in Sonic R
Sonic R Artwork Set 4: Accumulate a total of two hours of game play time in Sonic R
Sonic The Fighters Artwork Set 3: Accumulate over 1 hour of game play in Sonic: The Fighters
Sonic The Fighters Artwork Set 1: Play Sonic: The Fighters five times
Sonic The Fighters Artwork Set 2: Play Sonic: The Fighters ten Times
Sonic The Fighters Artwork Set 4: Accumulate a total of two hours of game play time in Sonic: The Fighters
Sonic Vs. Metal Sonic Sonic Screensaver Artwork: Successfully complete Sonic CD

After unlocking the following pictures, select them in the indicated order to unlock the corresponding bonus. If you entered the code correctly, you will hear a sound.

160 (Chaotix logo from the top): 146, 145, 144, 142, 143
180 (Shape of a GEM): 162, 163, 164, 166, 170, 172, 174, 178
200 (Order pictures appear in the credits): 12, 23, 54, 10, 22, 25, 39, 56
218 to 219 (7 Metal Sonics): 10, 25, 39, 40, 56, 93, 160
220 (8 Sega logos): 18, 106, 118, 136, 137, 138, 139, 140
260 (Fighters CPU order): 5, 4, 9, 8, 3, 6, 7, 2, 10, 11
281 to 285 (6 Holiday): 110, 112, 122, 130, 132, 137

Time Attack mode options
Successfully complete the game, then restart the game in "Time Attack" mode. The following options will be available if the "Time Attack" game can be completed within the corresponding time limit:

Music test
Successfully complete "Time Attack" mode within 37:27:57. A "D.A. Garden" option will appear to the left of the "RAM Data" option on the main menu. The Planet of Mobius will be displayed.

Play bonus levels
Successfully complete "Time Attack" mode within 30:21:05, then press Left at the "Time Attack" screen.

View video sequences
Successfully complete "Time Attack" mode within 25:46:12. A "Visual Mode" option will appear to the left of "D.A. Garden" option on the main menu. Use this option to view the video sequences in the game.

Level select
At the Sonic CD title screen, press Up, Down(2), Left, Right, A.

Programmer high scores
At the Sonic CD title screen, press Right(2), Up(2), Down, A.

Sound test mode options
At the Sonic CD title screen while "Press Start" is blinking, press Down(3), Left, Right, A to display the sound test menu. Set one of the following sound combinations and press Start to activate the corresponding cheat function:

Sounds Result
PM11, DA09 View hidden scene
PM04, DA21 View hidden scene
PM07, DA07 View hidden scene
PM12, DA25 View hidden scene
PM12, DA11 View hidden scene
PM03, DA01 View hidden scene

Radiant Emerald course
Finish in first place on all normal courses to unlock the Radiant Emerald course.

Play as Dr. Robotnik
Finish in first place on the Radiant Emerald course to unlock Dr. Robotnik. Alternately, successfully complete all levels.

Play as Mecha Knuckles
Collect all five coins in Radioactive Factory, and finish in first, second, or third place. Then, defeat Mecha Knuckles in a race to unlock him.

Play as Mecha Robotnik
Collect all five coins in Regal Ruins and finish in first, second, or third place. Then, defeat Mecha Robitnik in a race to unlock him.

Play as Mecha Sonic
Collect all five coins on Resort Island and finish in first, second or third place. Then, defeat Mecha Sonic in a race to unlock him.

Play as Puppet Tails
Collect all five coins in Radical City and finish in first, second, or third place. Then, defeat Puppet Tails in a race to unlock him.

Play as Super Sonic
Collect all seven Chaos Emeralds from the first four courses. To collect a Chaos Emerald, you must collect it and finish in first place in that race. Then, press Down while highlighting Sonic at the character selection screen.

Play as robot form character
Get the five Sonic coins in one of the following levels to play as the robot form for the indicated character:

Mecha Knuckles: Reactive Factory
Mecha Robotnik: Any level with Robotnik
Mecha Sonic: Resort Island
Puppet Tails: Radical City

Play as Super Sonic
Choose Sonic in single player mode. Win eight matches without losing any rounds, then defeat Metal Sonic in the first round of the ninth match. When round two starts, press Away + Punch + Kick to activate Hyper mode. Sonic will turn into Super Sonic.