Sonic Fanon Wiki

Sonic Adventure 3 (ソニックアドベンチャー Sonikku Adobenchā 3) is a 2021 Sonic the Hedgehog 3D Platformer that will be released for the 30th Anniversary of Sonic the Hedgehog. It will be released for Nintendo Switch, PC, PlayStation 4, PlayStation 5, Xbox One, and Xbox Series X/S on November 16, 2021, and on Nintendo GamePort, titled Sonic Adventure 3 Alpha on November 19, 2024, marking the console’s release.


After the release of Sonic Forces, Sega had the idea for a sequel to Sonic Generations, intended as a game that would "save the franchise." The idea for the game's story was that Modern Sonic and Classic Sonic would be the only playable characters and Modern Sonic would be lost in Classic Sonic's world and would be forced to team up with characters who hadn't appeared since the classic games, but in the process of making the Sonic the Hedgehog film, Sega, as well as all of the characters that were linked to Sega and were owned by other companies such as Archie, were bought by Paramount, which allowed them to have a much larger budget and get back veteran staff that worked on the Sonic Adventure titles. While they carried on the original idea, they made it a third Sonic Adventure title, and instead of the classic games, the game would cross over with the now-defunct Sonic the Hedgehog comic series published by Archie Comics.


Running Stages

For Sonic, Shadow, Mina, and Maximus, a player controls a character through a high-speed adventure-based stage. Much like the modern games, it features wisps to boost your power. The Running Stages are more like Sonic Adventure, Sonic Adventure 2 and Sonic the Hedgehog (2006)’s adventure gameplay, rather than the gameplay of every Sonic game since Sonic Unleashed.

Shooting Stages

For Tails, Omega, Rotor, and Eggman, a player controls a flying character in an environment high up in the sky. The character holds weapons that can be thrown at flying enemies.

Treasure Hunting Stages

For Knuckles, Omega, Nicole, and Metal Knuckles, a player must go through an open world and find three objects, hidden through the area. A player is given an Emerald Radar to make it easier to find the objects.

Fighting Stages

For Amy, Sally, Blaze, and Metal Sonic, the gameplay is based on using attacks to defeat enemies. For each stage, there are five "waves" of enemies. It is similar to the Mystery Dimension from the 2015 video game, LEGO Dimensions.


A mysterious wave of dimensional energy brings Sonic and his friends to a mysterious other dimension, which is similar to their own. There, they meet the Freedom Fighters, led by Princess Sally Acorn, who say they know our heroes. Sally is at war with a mysterious being called MetaMax, who is a known contact of Dr. Eggman. Then they discover that both worlds are two disassembled halves of a larger world. Now, Sonic must gather a large group of allies to collect the Chaos Emeralds, before both worlds are destroyed. Meanwhile, in Sonic’s home world, Shadow and Silver have been framed for a crime that they didn’t do, so they must run from G.U.N., which is now under Eggman’s control.



The game begins with Sonic running through Emerald Coast, having a last look at his former hometown, Station Square before he departs to his new hometown, a large, bright, futuristic city called Neotropolis. Then he gets on the ferry which is headed for Neotropolis.

Team Sonic

This story begins in Neotropolis, two days before Christmas, where we see the citizens going to the Santa Claus Parade. Then, the citizens see a large explosion, coming from across the city. A mysterious portal opens and Dr. Eggman comes out. He explains that he made it with the Warp Topaz. Fortunately, Sonic arrives to take the mystical gem from Eggman. Eggman flies away, so Sonic chases him across a large highway. Eggman sends in a dinosaur-shaped robot which Sonic defeats, only to find that Eggman is gone.

A few hours later, Tails traces the energy from the Warp Topaz to the Egg Carrier, which is in Neotropolis’ airspace. Tails flies there in the Tornado but it explodes, so he flies there with his own two tails. He throws a bomb in the centre of the Egg Carrier and it explodes and the Warp Topaz falls into his hand, but when he flies down to the ground, he finds out that it’s a fake and Eggman has the real one, so Eggman teleports back to his base.

Later that night, Knuckles guards the Master Emerald on Angel Island, but Metal Knuckles arrives on the island and the two fight over the Master Emerald, trying to grab it from each other. Unfortunately, Metal Knuckles gets the Master Emerald and charges the Warp Topaz with its power. The Master Emerald physically breaks from the power combination, but its power successfully combines with the Warp Topaz’s power. Knuckles decides to find the pieces of the Master Emerald and finds some in a nearby desert. When he finds the pieces, they give him a vision of two thousand years in the past, when we see Tikal trying to use the Master Emerald’s power to duplicate the Chaos Emeralds in order to save her tribe, but as she duplicates them, she duplicated the entire universe as well, which leads to the creation of the Warp Topaz. Then the vision stops and Knuckles is back in the desert.

The next morning, Amy enjoys a relaxing tropical vacation, but misses Sonic. Then, many robots arrive in order to capture Amy, who is the leader of the Restoration, whom have stopped Eggman in the past. After Amy finishes off the robots, Sonic, who has had a large crush on Amy for several years, arrives and tries to impress Amy, but fails intimately. Amy comes with him anyway to help him and Tails stop Eggman.

Sonic and Amy arrive at Tails’ new workshop, which is under a building, and are very impressed by it. The three fly up to Eggman’s mobile base, the Faceship, and Sonic runs through to confront Eggman. Sonic and Eggman fight until Eggman uses the newly enhanced Warp Topaz mysteriously. Sonic, Tails, and Amy run out of the Faceship, but the Warp Topaz’s powers allow the entire ship to implode.

Back on Angel Island, Knuckles attempts to put the Master Emerald shards back on his shrine, where they belong, but both Knuckles and the shards spontaneously teleport to a dark cave, where Knuckles senses more Master Emerald shards. After he finds the shards, Knuckles goes into another vision, but this time it’s different. He sees a mysterious echidna in a green, infinite, empty space. Knuckles asks where he is and the echidna says that he’s inside the Master Emerald, and Knuckles discovers that he is back in time. The echidna reveals to Knuckles that he is his father, Lockdown, and he has been inside the Master Emerald for thousands of years, but he used the Master Emerald's powers to create Knuckles. Then Lockdown warns Knuckles that the universe has been duplicated and if he doesn’t find both universes’ Master Emerald, as well as both universes’ Chaos Emeralds, everyone and everything in both universes will be destroyed. The vision ends and Knuckles arrives back in the cave.

Sonic wakes up amongst a mysterious chipmunk, who says she knows him. Tails and Amy, whom also don’t recognize her, feel weird, and Tails sees that the Miles Electric is glitched. The gang escape and meet up with Knuckles in Station Square. Knuckles tells them that they have made it to a duplicate of their universe and must find the Chaos Emeralds and Master Emerald before the prophecized destruction of both universes. Then, Tails notices a mysterious ring on top of the Miles Electric, and then he notices that a mysterious hologram, resembling a lynx comes out. She says that her name is Nicole the Holo-Lynx and she knows where the Chaos Emeralds are. She leads Sonic and Amy toward two of the Chaos Emeralds and comes with Tails because she is in the Miles Electric, but informs the team that she cannot help them because she needs to find the pieces of the shattered Techno Gem, which keeps Cyberspace stable.

Tails breaks into a G.U.N. facility, because that's where Nicole directed him to find the Chaos Emerald. He shoots down the G.U.N. robots and breaks the facility, meaning that he is now a fugitive. Tails fights and defeats a G.U.N. mech and retrieves the Chaos Emerald, which allows him to regain some of his memories. Then Nicole checks in with Tails and he tells her that he retrieved both the Chaos Emerald and his memories of her.

Amy arrives at Eggman's storage facility, where Nicole led her to find the Chaos Emerald. Many Eggman robots guard the facility, so Amy beats them all, but the Chaos Emerald is put on a shipment train that belongs to Eggman. Amy decides to follow the train.

Sonic takes a plane to Abbat, where he runs through the Jungle to find the Chaos Emerald that Nicole directed him towards, many Eggman robots stop him. Fortunately, Sally comes to Sonic's rescue, destroying all of the robots in her path. Sally introduces herself to Sonic and tells him that she's his ex-girlfriend, which Sonic doesn't believe until a Chaos Emerald gives Sonic back his memory. Sonic tells Amy that he's developed feelings for Amy, but as they start to talk, a mysterious red hedgehog arrives and fights Sonic and Sally for the Chaos Emerald.

The Revolution

On a mission to retrieve the Warp Topaz which was stolen by Dr. Eggman, Shadow and Rouge break into Eggman's base. When they enter Eggman's throne room, Rouge attempts to steal the Warp Topaz herself, but when she touches it, she disintegrates. Shadow fights Eggman, hoping to get revenge for the loss of his fellow G.U.N. Agent.

Freedom Fighters


Eggman Empire






Playable Characters

Team Sonic

Character Image Stage Type
Sonic the Hedgehog Running
Miles “Tails” Prower Flying
Knuckles the Echidna Hunting
Amy Rose Fighting

The Revolution

Character Image Stage Type
Shadow the Hedgehog Running
Silver the Hedgehog Flying
Blaze the Cat Fighting
E-123 Omega Hunting

Freedom Fighters

Character Image Stage Type
Princess Sally Acorn Fighting
Nicole the Holo-Lynx Hunting
Rotor the Walrus Shooting
Mina Mongoose Running

Eggman Empire

Character Image Stage Type
Maximus the Destroyer Running
Dr. Eggman Flying
Metal Sonic Fighting
Metal Knuckles Hunting

Voice Cast

  • Max Mittelman as Sonic the Hedgehog
  • Mike Polloch as Dr. Eggman
  • Cassandra Lee Morris as Miles “Tails” Prower
  • Christopher Daniel Barnes as Knuckles the Echidna
  • Hynden Walch as Amy Rose
  • Tara Strong as Blaze the Cat and Princess Sally Acorn
  • Ashley Eckstein as Nicole the Holo-Lynx
  • Justin Roiland as Rotor the Walrus
  • Jessica DiCicco as Mina Mongoose
  • Jason Griffith as Shadow the Hedgehog
  • Mark Lund as Silver the Hedgehog
  • Vic Mignogna as E-123 Omega
  • TJ Miller as Maximus the Destroyer
  • Ryan Drummond as Metal Sonic
  • Scott Dreier as Metal Knuckles


The soundtrack of the game is by various artists. Due to a bigger budget, the game's soundtrack is by more recognizable artists.

Song Artist Description
Raise the Stakes Run The Jewels The main theme of the game.
His World (Remix) Weezer Sonic's main theme.
Unknown From M.E. (Remix) 50 Cent Knuckles' main theme
I am...All of Me (Remix) Darkthrone Shadow's main theme


Upon its release, the game received very positive reviews from reviewers across the globe. It received an 81 out of 100 on Metacritic, making it their second-best reviewed 3D Sonic game.

Many praised that the game had a lot of fan service, and gave fans exactly what they wanted, in gameplay, story, and characters. 1up praised the game's graphics and gameplay, saying that "The Sonic franchise has made it to the next level." They also said “Boy does it have its fair share of bright colours”. They finished off saying “All is fair in love and war. This game is a bit of both”, which made it to the front cover of the special edition. GamePro described the game as "Entertaining, beautiful, and expansive" therefore they called it "One of Sonic's best adventures yet."

Reviewer Score
GameRankings 80.2%
Metacritic 81/100
Edge 8/10
Famitsu 32/40
GamePro 4.2/5
Game Revolution A-
GameSpot 8.3/10
IGN 8.3/10
IMDb 7.7/10
GamesRadar 7.9/10
Eurogamer 8/10
Game Trailers 8.2/10
Nintendo Power 8.3/10
Gamespy 4/5
Screen Rant 4/5


  • This is the first Sonic game in 15 years to have the adventure formula.
  • Excluding remakes, this is the first 3D Sonic game for the Xbox Series X and PlayStation 5.
  • This is the first Sonic game since Sonic Heroes to have all characters playable in two-player battle.
  • This is the first Sonic game to fully realize Sonic and Amy's romantic relationship.
  • Though they keep their signature styles, Princess Sally Acorn and NICOLE the Holo-Lynx have significantly different designs.
    • Sally now wears a black long tank top and blue jeans.
    • NICOLE now has a purple streak in her hair and wears a purple and grey dress.
  • Much like Sonic Adventure 2, the game had an online tournament where players fought each other and the winner fought Sonic Team head Shun Nakamura.
  • Although he looks identical to the past games he was in, this is the first game where Tails is 12, rather than 8.