Sonic Vivacity

Sonic Vivacity [ソニック・ビバシティ Sonikku bibashiti] is a 2026 platform open-zone game developed by Sonic Team and published by Sega. Produced in commemoration of the 16th anniversary of Sonic Generations, the game follows Sonic and his sidekick Tails, and the other is Knuckles as they form an alliance with their modern selves once again. It features two gameplay styles: "Classic", which plays from a side-scrolling perspective like that of the original Sega Genesis Sonic games, and includes Open-World gameplay, and "Modern", 3D levels similar to those in Sonic Unleashed (2008), Sonic Frontiers (2022) and Sonic Colors (2010).
Vivacity integrates traditional Sonic the Hedgehog elements—such as platforming, rings, and grind rails—into the series' first open world. While exploring the open world, players can complete challenges, fight robotic enemies, and access "Cyber Space" levels inspired by previous Sonic games. The game brought back Sonic Frontiers OST and was remixed by Hyper Potions, except for the main boss themes.
Following the release of Sonic Frontiers (2022), Sonic Team was focusing for another Open-World Sonic game. Takashi Iizuka, head of Sonic Team, wanted Vivacity to be a model for future titles as for Frontiers's successor, as the game had done in 2022. Sonic Team settled on an open-ended design once again, and focused on adapting Sonic's abilities to an open world. As of Vivacity was similar to Sonic Generations, it brought back their OSTs from Vivacity to be remixed by Cash Cash & Hyper Potions. Vivacity was announced in December 2025.
Sonic Team sought to re-imagine the most popular aspects of the franchise in high-definition, and developed the game using the Hedgehog Engine. Each location and many bosses in the game are previously seen in an earlier entry in the series, with the game including numerous other references to past entries. Devil's Details and Dimps helped create the Windows and 3DS versions, respectively. Takashi once said Classic Sonic's gameplay will feature for an open-world gameplay. Takashi wanted to add Classic Knuckles for the game.
Vivacity was the second multi-platform Sonic game after Sonic Heroes. The player once again races a team of series characters through levels to amass rings, defeat robots, and collect the seven Chaos Emeralds needed to defeat Metal Sonic. Within each level, the player switches between the team's three characters, who each have unique abilities, to overcome obstacles. Eggman was playable after all in the game as if he was not the Antagonist on the game and never did something evil.
Insomniac Games, the developer of Marvel's Spider-Man, wanted to collab with SEGA for making the game more accurate, and added more GUIs and more new features to the Sonic Game. SEGA borrowed Blue Vivacity's logo, a content creator, to use it for the Sonic Game. 
The Story focuses on Sonic, seeing Eggman acting good, for putting flickies on the critters, Eggman decided not to use them for the robots, but never did something evil to the flickies, as Sonic wanted to tell what Eggman is up to. Eggman released one of the flickies away for the successful experiment... but something's wrong with Metal Sonic. Warping Sonic and the Others back through time with the Phantom Ruby. Teaming up with the classics, they have to stop Metal Sonic for the madness.
Therefore, this game was a fusion of Sonic Frontiers, Sonic Generations, Sonic Forces, Sonic Mania, and most of all, Sonic Adventure.
==Intro Sequence==
This intro sequence will be animated by WildBrain that brought you "Sonic Prime". The intro will have two different audio for the intro sequence in English Hyper Potions - "Friends" and Japanese will be by Hyper Potions - "Porta Vista".
(English Version) The intro begins with the start of the funky EDM music and exciting friendly bass drops. Until Sonic, Tails, Knuckles, and Eggman dashing with their classic selves, when Sonic starts to spindash and jumps on the spring and as the English game title appears (Without the Japanese title).
(Japanese Version) The intro begins with the start off with the fast funky EDM music and exciting friendly bass drops with little bit of a rock beat. Until Sonic, Tails, Knuckles, and Eggman dashing with their classic selves, when Sonic starts to spindash and jumps on the spring as the English game title appears with the Japanese title as the English game title appears with the Japanese title underneath it.
(Both Versions) The next scene begins continuing the music in different beats, we focus on Sonic and Classic Sonic running upon the sky, with a Green-Hill Styled platform as they jump on the sky as each other was flew by their Pal Tails, and Knuckles and his classic self runs, when Dr. Eggman and his classic self starts to wave at Sonic and his friends, we move onto the next scene as Metal Sonic angered and uses the Phantom Ruby to warp everything up as the world starts to shatter (the reference to Sonic Unleashed) as Sonic and Eggman manages to stop it, dashing through and clash to each other, as the scene ends.
==Plot/Summary==
The Storyline is the SAME as Sonic Generations, however, it is different. Just imagine that there are changes.
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Tails arrives at a gathering that is attended by his friends. Arriving soon after, Modern Sonic discovers that his friends have been preparing a surprise birthday party for him, as it is his birthday. Modern Sonic celebrates his birthday with his friends. When Eggman finds flickies to save for an experiment, he didnt do harm or evil, he followed his grandfather's advice, as Sonic sees Eggman doing "evil" things. Eggman saw Sonic but started to confront them. After going to Eggman's base, there are opened critters of flickies were eating with their favorite foods. Eggman shows Sonic, Tails, and Knuckles to Metal Sonic, helping him to reprogram to be a good badnik, but something is not right after that. Metal Sonic bashed down the four and starts to steal the Phantom Ruby, letting them warp back in time. And Eggman's badniks, vehicles are starting to get out of control, and possessed.
A while later, Modern Sonic regains consciousness, though he finds himself in a strange dimension known as White Space. Noticing a colorless portion of Green Hill and Tails (now a colorless statue) nearby, Modern Sonic races through Green Hill, which regains color and life after he runs through it. At the same time, Tails is restored too. Classic Sonic finds Modern Sonic once again meeting at the third time. Eggman and Sonic was confused about what's going on to Metal Sonic, guessing it was their fault, or something was just wrong. The two Sonics will be back to business to restore the others. Eggman met Classic Knuckles, when Eggman and Tails confronted him, but instead being his companion.
Afterwards, the two Sonics race through Sky Sanctuary, restoring Knuckles in the process. Following that, Classic Sonic ends up on a highway in Stardust Speedway, where he defeats Classic Metal Sonic and gets a Chaos Emerald from him. Later, Modern Sonic and Classic Sonic end up inside a Boss Gate at the same time, separated by a glass wall, which they each think is a mirror. Suddenly however, Modern Eggman's voice is heard from the exit of the Boss Gate, telling that the two hedgehogs have a few missions left while Eggman tries to help them. While Modern Sonic agreed by the information, Classic Sonic heads into the exit. Modern Sonic then realizes that his pal ran, and tries to enter the exit as well, only for it to close before he is able to pass through it. Meanwhile, Classic Sonic, Classic Tails, and Class Knuckles fights Classic Eggman and his Death Egg Robot aboard the Death Egg. After the doctor is defeated though, Modern Eggman, Modern Sonic, Modern Knuckles, and Modern Tails didn't know Classic Eggman was their ally yet, but regained consciousness. Classic Eggman was confused and wanted to tell him what's going on, as Classic Eggman agrees. Later, both Sonics meet in White Space, surprised by each other's presence. They meet up the classics. The six of them then discover that they are traveling through time and space, which explains the various locations they recognize. The quartet subsequently team up to stop the Time Eater's rampage and save their remaining friends.
Modern Eggman and Classic Eggman wanted to help Tails for the two Sonics to complete restoring the others, but all of them encountered Metal Sonic again with the change of good looks, Eggman and Sonic was shooked and followed him. Sonic jumps onto Eggman's flying circular car and follows Metal Sonic, after Metal Sonic's defeat, he escaped. Continuing onward, the Sonics rescue Cream the Rabbit and Cheese after restoring Speed Highway, Rouge after restoring City Escape, and Espio after restoring Seaside Hill. Along the way, the two Tailses figure out that the Time Eater is tearing space apart as it moves through time, thereby ripping places from across space and time from their locations in their timelines and placing the-now lifeless and dead areas in White Space. The Eggmans helps Tails of finding the Broken-Halfed Phantom Ruby, when they need to find the other one to merge it back. However, by speeding through time in these areas, the Sonics are able to fix space and return life to these areas. With the universe about to fall into chaos because of the Time Eater however, the Sonics realize they have to get going like never before. Soon after, Modern Sonic claims a Chaos Emerald following a meeting and clash with Shadow onboard the Space Colony ARK.
After that, the giant creature Modern Sonic faced was back.... it's Giganto. Classic Sonic relies on Modern Sonic to finish the mission, Sonic finds himself going super to defeat Giganto once and for all. Modern Sonic meets up Classic Sonic, as Sonics pass through Crisis City, Rooftop Run and Planet Wisp, restoring these locations and rescuing Blaze, Vector and Charmy too. Modern and Classic Sonic had the same feeling if the Time Eater was back, and they were worried. Eggmans and Tailses found the 2 hedgehog, as they had the same feeling if the Time Eater was back, and starts to worry theirselves. Eggman's Egg Dragoon was later digging up and starts to encounter the Eggmans, Tailses, and Sonics, when Eggman was confused who is controlling it, but it was possessed. Once Sonic found a way to unpossess the Egg Dragoon, it turned normal. Modern Eggman and Classic Eggman starts to enter the Egg Dragoon, allowing the Sonics and Tailses for help. The gang was warped onto the sky with full of imaginating balloons and flying springs. The 2 Sonics ran over a confused zone, as it was sky high, collecting the last Chaos Emerald. Sonic then encounters Wyvern once again, going through Super Form. After the battle, he was destroyed once again. The Knuckleses followed Sonic and the others as Metal Sonic steals the Master Emerald.
After collecting all the Chaos Emeralds, the Sonics and Tailses confront the Time Eater in its domain as the piece of the Phantom Ruby starts to put it back together, when Metal Sonic took it. There, they discover that the Time Eater is being piloted by both Classic Eggman and Modern Eggman. Modern Eggman reveals that while drifting through space following the events of the Wisp incident, he found the primordial form of the Time Eater. The Eggmans, Sonics, and Tailses saw Metal Sonic driving the Time Eater to help him. Eggmans were worried and they didn't do such an evil thing, but Sonic tells them not to worry, as once again, the 2 thereby activating the power of the Chaos Emeralds and allowing the Sonics to transform into Modern Super Sonic and Classic Super Sonic. The super-powered hedgehogs proceed to confront the Time Eater in another dimension and manage to destroy it. The heroes then return to the present of Modern Sonic's dimension, with everything having seemingly returned to normal. There, the group continues to celebrate Modern Sonic's birthday. During the party, Modern Sonic thanks Classic Sonic for the team-up while Classic Sonic attempts to demonstrate the Boost. Although he fails, Modern Sonic encourages to continue working on it. Afterward, Classic Sonic and Classic Tails find a stray Time Hole for them to return home with. As the counterparts and the party guests then bid farewell to each other, Modern Sonic promises Classic Sonic a great future, just as Classic Sonic and Classic Tails pass through the closing Time Hole.
His friends and Eggmans yayed, but Metal Sonic didn't give up yet, as he goes Super. The 2 Sonics starts to fight Metal Sonic with enhanced strength and mechanics. After a long fight, Metal Sonic was once turned normal, as it turns out he was destroyed and made a larger impact like a nuclear bomb, blowing everyone back away. Meanwhile, the others gained consciousness, as the portal opened. Modern Sonic and his friends tries to say one last goodbye to their classic selves, as Knuckles lifted the Master Emerald.
===Characters===
Image	Character 	Biography
 	Sonic (Modern) 	The world's fastest supersonic hedgehog is back again. He loves freedom, and hates anything unjust. Although he's short tempered at times. Sonic finally confronts Eggman as Eggman turned to a good scientist, until Metal Sonic steals a Phantom Roby and warped everyone up.
 	Sonic (Classic) 	The world's fastest supersonic hedgehog is back again. He loves freedom, and hates anything unjust. Although he's short tempered at times. Sonic finally confronts Eggman as Eggman turned to a good scientist, until Metal Sonic steals a Phantom Roby and warped everyone up.
 	Tails (Modern) 	Tails is a kid fox who can fly by spinning his two tails. He loves to work with machinery, and his inventions have helped Sonic many times.
 	Tails (Classic) 	Tails is a kid fox who can fly by spinning his two tails. He loves to work with machinery, and his inventions have helped Sonic many times.
 	Knuckles (Modern) 	A powerful hot-blooded warrior, and a fitting rival for Sonic.
He is thought of as being the last of the great Echidna tribe, and continues to protect the Master Emerald on Angel Island. But the warp happened, meeting his small hot-blooded self.
 	Knuckles (Classic) 	A powerful hot-blooded warrior, and a fitting rival for Sonic.
He is thought of as being the last of the great Echidna tribe, and continues to protect the Master Emerald on Angel Island. But the warp happened, meeting his small hot-blooded self.
 	Dr. Eggman (Modern) 	An evil genius scientist and Sonic's nemesis, that turned to a good guy with good deeds from his advice of his grandfather, and Maria. For saving the flickies, his science experiment went something wrong as Metal Sonic starts to take another madness as Eggman didn't do anything evil as turns out Sonic and Eggman saw him using the Phantom Ruby, causing them to warp back in time.
 	Dr. Eggman (Classic) 	An evil genius scientist and Sonic's nemesis, that turned to a good guy with good deeds from his advice of his grandfather, and Maria. For saving the flickies, his science experiment went something wrong as Metal Sonic starts to take another madness as Eggman didn't do anything evil as turns out Sonic and Eggman saw him using the Phantom Ruby, causing them to warp back in time.
 	Metal Sonic/Metal Sonic MK2	An evil, ultra-high performance, very advanced Badnik version of Sonic the Hedgehog that was created as a secret weapon by Dr. Eggman for the sole purpose of destroying the hedgehog. But not anymore, as Dr. Eggan fix his programs to be good, Metal Sonic became more evil as Eggman programmed him to be a good robot, until he made a chaos and warp them back in time.
Once Metal Sonic was turned pure evil, he was changed and had a better mechanics and appearance.
== Gameplay ==
To be added...
== Characters ==
You can choose any of the characters to play for the story mode of the game. It does not matter if you play as one of Sonic's, Classic Sonic's team as there are no more separate and overlapping stories in the game. There is only one story for the game. 
=== Main Protagonists ===
==== Playable ====
* Team Sonic (Modern Heroes) - Modern Sonic, Modern Knuckles, Modern Tails: This team and their associated stages are designed to be of medium or normal difficulty, and contain some high-speed sections.
* Team Sonic (Classic Heroes) - Classic Sonic, Classic Knuckles, Classic Tails: This team and their associated stages are designed to be of easy difficulty, and contain some high-speed sections. These missions are different to the modern.
* Team Eggman (Anti-Villain/Anti-Heroes) - Modern Dr. Eggman, Classic Dr. Eggman
==== Non-Playable ====
* Amy Rose
* Animals
* Bark the Polar Bear (cameo)
* Bean the Dynamite (cameo)
* Big the Cat (cameo)
* Blaze the Cat
* Chao
** Cheese
* Charmy Bee
* Chip (cameo)
* Dr. Eggman
* Dr. Eggman (Classic) (first appearance)
* Cream the Rabbit	
* Cubot (flashback)
* Dark Gaia (cameo)
* E-123 Omega (cameo)
* Espio the Chameleon
* Fang the Sniper (cameo)
* Jet the Hawk (cameo)
* Knuckles the Echidna
* Mephiles the Dark (cameo)
* Metal Sonic (Classic) (first appearance)
* Mighty the Armadillo (cameo)
* Miles "Tails" Prower
* Miles "Tails" Prower (Classic) (first appearance)
* Omochao
* Orbot (flashback)
* Ray the Flying Squirrel (cameo)
* Rouge the Bat
* Shadow the Hedgehog
* Silver the Hedgehog
* Storm the Albatross (cameo)
* Tikal (cameo)
* Vector the Crocodile
* Wave the Swallow (cameo)
* Wisps
** White Wisps
*** Yacker (cameo)
=== Main Antagonists ===
* Metal Sonic/Metal Sonic MK2
* Time Eater
* Egg Dragoon (Formerly)
* Aero-Cannon
* Buzz Bomber
* Buzz Bomber (Classic) (first appearance)
* Buzzer
* Buzzer (Classic) (first appearance)
* Chopper
* Chopper (Classic) (first appearance)
* Cop Speeder
* Crabmeat
* Crabmeat (Classic) (first appearance)
* Egg Chaser
* Egg Fighter	
* Egg Fighter: Sword
* Egg Launcher (H)
* Egg Launcher (H+V)
* Egg Launcher (V)
* Egg Pawn
* Eggrobo
* Giant Chopper
* Grabber
* Gun Beetle
* Gun Hunter
* Iblis's Minions
** Iblis Biter	
* Iblis
** Iblis Taker
** Iblis Worm
* Mono Beetle
* Moto Bug
* Moto Bug (Classic) (first appearance)
* Sandworm
* Spinner
* Spiny
* Sprinkler
* Thunder Spinner
=== Bosses ===
==== Rivals ====
# Metal Sonic
# Shadow the Hedgehog
# Silver the Hedgehog
# Giganto
# Wyvern
==== Bosses ====
# Death Egg Robot
# Egg Dragoon (formerly)
# Time Eater (first appearance)
== Stages ==
Stages are divided into three eras, each representing games from a different generation of video game consoles. The "Classic Era" represents Sega Mega Drive games. The "Dreamcast Era" represents games from the Dreamcast, Nintendo GameCube, Xbox, and PlayStation 2. The "Modern Era" represents games from the PlayStation 5, Xbox 360, and Wii.
# Classic Era:
## Green Hill
## Chemical Plant
## Sky Sanctuary
# Dreamcast Era:
## Speed Highway
## City Escape
## Seaside Hill
# Modern Era:
## Crisis City
## Rooftop Run
## Planet Wisp
In addition to the main stages, Casino Night is also included as an optional stage in the Classic Era as DLC. The Levels of Sonic Frontiers, Chronos Island was added for Giganto boss fight, and Wyvern.
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