If you haven't already unlocked her, you may now play as Amy.

Learn how to unlock and play as Amy in Sonic Adventure. Follow this guide to progress through the story and access new gameplay.

If you haven't already unlocked her, you may now play as Amy. Head back to the part of town near the main entrance to the train station, then go near the capsule-like thing next to the ocean. A robot appears here. Sonic wants to take it on, but Amy sees a sign for Twinkle Park that says, "cute couples get in free." She of course rushes in, and Sonic has no choice but to follow her into stage five, Twinkle Park.

Once Sonic exits the level, he ends up in a small room. Unfortunately, Amy is nowhere to be seen. Sonic figures that the robot must be chasing her, so he needs to get to her as quickly as possible. On the left of this room is a door that you can enter to play the Twinkle Circuit mini-game. It's not necessary to play it to beat the game, but there are two emblems that you can win from it. To continue on with the main game, head down the path to reach another door that leads back into town.

When you exit, you'll see an employee card appear in a patch of grass in the middle of the road in front of the train station. Grab it, then go to the garage (it's to the left of Twinkle Park). The door will open, so enter either of the two elevators to go to stage six, Speed Highway.

Back in town, go to the Casino Area. Sonic wonders where he can find Amy when he hears her scream. He turns around to see the robot carrying her off. Go into the train station, and then hop a train to the Mystic Ruins.

When Sonic exits the train, he sees the robot and confronts him. Suddenly, the world turns black, and Sonic looks up to see the Egg Carrier blocking out the sun. It beams up the robot, taking Amy with it. Sonic then runs off in pursuit of the Egg Carrier.

Go in the same tunnel you used to get to the Icecap stage, but this time go all the way through and out the door on the other side. Hug the cliff until you see the Ancient Light upgrade. Get it, and then go to the right until you see a monkey in a cage. Use the Light Speed Attack to destroy it, and then go into the newly opened gateway for stage seven, Red Mountain.

Note: If you want, you can go check out the Emerald Shrine, but you don't have anything to do there... yet.

When you destroy the capsule at the end of Red Mountain, Tails will show up in an airplane. Sonic will jump on, and then you'll engage in Sky Chase Act 2.

Tails will land (well, crash-land) the plane on the Egg Carrier, and Sonic will hop out. He is amazed at the size of the ship, but Tails says there isn't any time to gawk, as they need to find Amy. Sonic agrees, and they set off.

Head up the runway and hit the spring. Take a few more steps forward, and you'll hear Eggman's voice. He will brag about the power of the Egg Carrier, and then change its shape. He then says that the only way to get to him now is to go through the Sky Deck. Head up the ramp and go through the door to enter stage eight, Sky Deck.

When Sonic emerges, he ends up in the ship's hull. Run over to the left and go down the stairs, then look around for a gold half-egg thing. Jump in it to rise to the ship's deck.

On the deck, you will find Eggman and Amy. Eggman takes the bird Amy was guarding. Turns out, it was keeping a Chaos Emerald. Eggman then calls the robot E-102Y to fight Sonic.

Mini-Boss: E-102Y

• Hits to Defeat: 3
• Difficulty: Easy

He's a pushover. Just use the homing attack a few times, and he'll be beaten. If you act quickly, he won't be able to get an attack in edgewise.

Just as Sonic is about to finish off the robot, Amy runs in and tells Sonic to stop. She says that the robot helped her, and is her friend. Sonic decides to let the robot go, as Amy must have her reasons for not wanting him to be harmed. Just then, Tails comments that the ship is losing altitude. Immediately Sonic sets off to find Eggman.