Mission Mode[edit]
Complete a character's story (except for Super Sonic), then Mission Mode for that character will be unlocked.
Metal Sonic[edit]
Collect all 130 Emblems in the game and Metal Sonic will be playable in Trial Mode where he can only play in Sonic's stages.
Sega Game Gear games[edit]
This game features many unlockable games previously available on the Sega Game Gear handheld. These games can only be unlocked on the Nintendo GameCube and the 2004 PC versions of the game.
The games are awarded to you in this order:
The games are granted to you at the following times:
Emblems Collected (8 times)
- 20 Emblems
- 40 Emblems
- 60 Emblems
- 80 Emblems
- 100 Emblems
- 110 Emblems
- 120 Emblems
- 130 Emblems
Missions Completed (3 times)
- 20 Missions
- 40 Missions
- 60 Missions
Helpful tips[edit]
Change screen size: Press and simultaneously to change the screen into a smaller size that is closer to an actual Game Gear screen.
Multiplayer: In any game, press on the second controller to make a second screen show up. The game will reset and sync both screens with each other, allowing multiplayer. Some games will NOT have multiplayer, and will just allow 2 players to play the same game on different screens. When playing with two screens on a Non-Multiplayer game, the sound from both games will play at once. This can be done with ANY game.
Play the Japanese version: Go to the Options Menu and switch the text to Japanese. Several of Game Gear games will now be their Japanese version counterparts.
PlayStation 3 and Xbox 360[edit]
Sonic Adventure DX DLC[edit]
Sonic Adventure for the PlayStation 3 and Xbox 360 requires the Sonic Adventure DX Add-on in order to unlock Mission Mode and Metal Sonic, it also contains an additional 3 trophies and achievements.
PlayStation Home items[edit]
The following items can be unlocked for use in PlayStation Home and can be worn by either males or females.
Unlockable | How to Unlock |
---|---|
Light-Speed Shoes | Load a save file that has the Light-Speed shoes unlocked |
Sonic Adventure T-Shirt | Load a save file which has all the characters stories completed |
Avatar items[edit]
The following items can be unlocked for Avatars and can be worn by either males or females.
Unlockable | How to Unlock |
---|---|
Vintage Sonic Tee | Play for 5 hours |
Sonic's Hi-Speed Shoes | Play for 10 hours |