8. Story: E-102 Gamma - Sonic Adventure Walkthrough
Michael Gray
Updated on April 08, 2026
Gamma is one of Eggman's robots designed to do his bidding. Walk over to Eggman to test your skills in his training course.
Final Egg
In Gamma's stages, time runs down and you need to hit targets to gain time. Hold to keep your targeting sensor up, then release it to launch projectiles. You gain more time if you hit multiple targets in the same combo. For this stage, all you have to do is go down a small path and hit a Sonic doll three times.
When you're done, drop to the lower floor of the base and talk to Eggman again. He'll pit you against your brother, E-101 Beta. The winner of this fight gets to work on the Egg Carrier.
Boss Battle: E-101 Beta
All you have to do is tap three times to defeat Beta. All of Gamma's fights are pretty easy.
The Egg Carrier will take off with you on it, and you and a few other E series robots will be briefed on your mission. Eggman wants you to catch a tailed frog. Go through the hotel and blast some targets to get to the beach.
Emerald Coast
Travel through the first part of the stage and, when you get onto the next sand bank, jump up onto the grass and rush the monkeys to find Froggy. You have way, way more time than you need.
Tikal will give you a vision of the past. Walk up and listen to her, then show Eggman your frog you caught. Watch the cutscenes unfold and witness Gamma as he starts to understand something is very wrong here. Enter the right room and approach Amy in her holding cell. Gamma will hyperventilate when he sees the bird and will decide to let Amy go.
Look on the map and grab the Jet Booster from the Arsenal room in the Egg Carrier Hall. This will let you hover long gaps in the air; it's sort of like Knuckles' gliding but you last longer in the air and won't move as fast. Take the elevator up to the top of the ship.
Boss Battle: Sonic
Just hit him three times once his invincibility frames wear off.
After the battle, Amy will protect you since you let her out. You'll leave the ship and realize how bad of a person Dr. Eggman is with the new mission of liberating your former allies. First, take the boat under the train station to get back to the Egg Carrier. As a reminder, the way back will be a boat in the southwest corner of the map. Go back to the elevator and go to the hall once more, this time entering the water tank room. Take the Laser Blaster to deal more damage, then go to Tails' workshop.
As you've done before, pick up the Wind Stone and take it to the wind cave. It's time to go to Windy Valley to take on E-103 Delta.
Windy Valley
Just travel through the short level and hit things to build up combos. No need to slow down at all - not that you're short on time. At the end, you'll have to fight Delta with four missile shots. This should be as easy as any other non-Chaos boss battle so far.
Next, go to Red Mountain. The path to the entrance will now be accessible.
Red Mountain
Another standard affair. E-104 Epsilon takes a few more hits than Delta did but goes down just as easily.
One of Gamma's brothers is in Hot Shelter. Take the boat back to the Egg Carrier again and use the elevator to get to the hall, then enter the middle door.
Hot Shelter
There are some buttons in this level that you need to press in order to be picked up by a crane. Pretty simple stuff. The second part of Hot Shelter takes place in some tunnel tracks where you need to approach the front of one of the trains and hit a button to arrive in a station. E-105 Zeta is a much different beast from the others, as Eggman has altered him into an octopus-missile-monstrosity. To defeat him, just ride the platform in a circle and mash to fire your projectiles at his circular metal arms that pop out of him.
That's all three of your colorful allies. Go outside and watch Gamma reflect on what he's been doing, then face your final foe on that ever-so-popular glass circle.
Boss Battle: E-101 Beta
Beta can only be hurt when he charges and his butt is exposed. Focus on hitting the missiles he fires at you, then avoiding his lasers he fires from above. You're on a three minute time limit, so you need to make sure you hit Beta at every opportunity given to you.
Eggman's robot army will be put to rest once Beta is defeated, and Gamma will get a great payoff for saving his friends. This is without a doubt the best story in this game.
9. Story: Big7. Story: AmyFind anything you think is wrong with this walkthrough? Help us fix it by posting in its Walkthrough Thread.This walkthrough is the property of TrueAchievements.com. This walkthrough and any content included may not be reproduced without written permission. TrueAchievements.com and its users have no affiliation with any of this game's creators or copyright holders and any trademarks used herein belong to their respective owners.