Sonic Gems Collection cheats and cheat codes for Gamecube

Unlock songs

Living in the City LTN Mix
Start Sonic R 10 times (just enter and exit the game) 

Sonic After 6290 Mix
Start Sonic CD 10 times (just enter and exit the game) 

Sonic 6290 Mix and Sonic Boom D'mb Mix
Start Sonic CD 5 times (just enter and exit the game)

Can You Feel The Sunshine ACID Mix
Reach 3 hour total play time in Sonic R


Unlock Museum images
Reach 1 hour total play time in Sonic CD: Sonic CD concept art Set 3
Reach 1 hour total play time in Sonic R: Sonic R concept art Set 3
Reach 1 hour total play time in Sonic Spinball: Sonic Adv. DX concept art Set 3
Reach 1 hour total play time in Tails Adventure: Sonic Heroes Movie Set 3
Reach 1 hour total play time in Sonic: Fighters concept art Set 3
Reach 2 hour total play time in Sonic: Fighters concept art Set 4
Reach 2 hour total play time in Sonic CD: Sonic CD concept art Set 4
Reach 2 hour total play time in Sonic R: Sonic R concept art Set 4
Reach 2 hour total play time in Sonic Spinball: Sonic Adv. DX concept art Set 4

Play Sonic: Fighters concept art Set 1
Play Sonic: Fighters concept art Set 2
Play Sonic CD at least 5 times: Sonic CD concept art Set 1
Play Sonic CD at least 10 times: Sonic CD concept art Set 2
Play Sonic R at least 5 times: Sonic R concept art Set 1
Play Sonic R at least 10 Times: Sonic R concept art Set 2
Play Sonic Spinball at least 5 times: Sonic Adventure DX concept art Set 1
Play Sonic Spinball at least 10 times: Sonic Adventure DX concept art Set 2
Play Tails Adventure at least 5 times: Sonic Heroes Movies Set 1
Play Tails Adventure at least 10 times: Sonic Heroes Movie Set 2
Finish Sonic: Sonic Championship logo
Finish Sonic CD: Sonic Vs. Metal Sonic Sonic Screensaver Artwork

Unlock picture bonuses
Unlock the pictures and select them in the indicated order:

10, 25, 39, 40, 56, 93, 160: 218 - 219 (7 Metal Sonics)
110, 112, 122, 130, 132, 137: 281 - 285 (6 Holiday)
12, 23, 54, 10, 22, 25, 39, 56: 200 (Order images in the credits)
146, 145, 144, 142, 143: 160 (Chaotix logo)
162, 163, 164, 166, 170, 172, 174, 178: 180 (Shape of a GEM)
18, 106, 118, 136, 137, 138, 139, 140: 220 (8 Sega logos)
5, 4, 9, 8, 3, 6, 7, 2, 10, 11: 260 (Fighters CPU order)
Complete all goals : 320
Watch the credits five times: 286 - 295
Watch the credits ten times: 296 - 300

Museum movies

Sonic Heroes Trailer
Reach more than 24 hour total play time with over 30 overall games played 

Sonic's History movie
Reach more than 24 hour total play time with over 50 overall games played

Sonic Adventure Intro
Reach more than 24 hour total play time with over 70 overall games played