Sonic Adventure Unlocks
- All platforms
- unlock
| Amy | Talk to her in the Casino as Sonic after finishing Sky Chase. |
| Big | Defeat Chaos 6 as Sonic. |
| E-102 Gamma | Defeat Gamma after finishing Sky Deck as Sonic or Tails. An alternate way to unlock him is to finish Twinkle Park as Amy and watch the FMAs after it. |
| Knuckles | Defeat him after finishing Ice cap as Sonic or Tails. |
| Miles Tails Prower | Finish the C mission of Emerald Coast action stage as Sonic. |
| Super Sonic | Finish the game as Sonic, Tails, Knuckles, Amy, Big and E-102 Gamma. Super Sonic will be avaliable only in Adventure Mode. |
Super Sonic: Complete the game with every character
| Ancient Light (Sonic) | On top of a rock on Angel Island |
| Booster (E-102) | In the Weapon's Armory on the Egg Carrier |
| Crystal Ring (Sonic) | Walk up the steps in the hotel, press the two buttons and use light speed dash |
| Fighting Gloves (Knuckles) | On a ledge over Big's house |
| Jet Anklet (Tails) | In a hole in the ceiling in the sewer behind Twinkle Park |
| Laser Blaster (E-102) | In the Restricted room on the Egg Carrier after it crashes |
| Life Belt (Big) | In the entrance to Icecap |
| Light Speed Shoes (Sonic) | Find it in the sewer (not the onebehind Twinkle Park) |
| Long Hammer (Amy) | Beat your own high score on Hedgehog Hammer after the Egg Carrier crashes |
| Long Rod (Big) | Under the bed at Big's hut |
| Lure Upgrade 1 (Big) | In the sewer behind Twinkle Park |
| Lure Upgrade 2 (Big) | Under an sheet of ice in IceCap |
| Lure Upgrade 3 (Big) | In a cave in the forest |
| Lure Upgrade 4 (Big) | In one of the jail cells on the Egg Carrier |
| Rhythm Badge (Tails) | In the flashback with Tikal |
| Shovel Claw (Knuckles) | In the tunnel inside the tunnel where you find the cart to the Mystic Ruins Chao Garden |
| Warrior Feather (Amy) | Beat Eggman's high-score on Hedgehog Hammer |
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John Doe