Sonic Adventure: Episode I - The Chaos Saga

Sonic Adventure: Episode I - The Chaos Saga is a platform game developed by Paradox Crystal and Sonic Team and published by Sega for PlayStation 4, PlayStation 5, Xbox One, Xbox Series X/S, Nintendo Switch and Microsoft Windows in December 2021. It is the first in a planned trilogy of games reimagining the Sonic Adventure games
Dr. Eggman has discovered the mighty monster known as Chaos, whom he plans to use to destroy Station Square and build both New Yoke City and Eggmanland on its ruins. To prevent their nemesis from achieving this goal, Sonic and Tails embark on an adventure to secure the seven Chaos Emeralds. Along the way, their old friends Knuckles, and Amy, as well as E-102 Gamma, a robot created by the doctor, and Big the Cat, who has lost his friend Froggy, get involved in the skirmish as well and learn of Chaos' past through mysterious visions.
==Plot==
==Gameplay==
Unlike Previous Remasters and Ports of Sonic Games, which sought to update and improve the original games, this remake reimagines the gameplay and stories for modern audiences, while also reimaging the original game's stories and gameplay into an open-world design while remaining true to the original game. 
==Development==
Development of Sonic Adventure: Episode I - The Chaos Saga started as a Remake of Sonic Adventure around 2013 with Sega Shanghai being the studio to develop the game instead of Sonic Team, who also made the HD Ports of Nights into Dreams, SA1 & SA2 on the X360, PS3 & Steam (And even made the Dreamcast Collection). They allowed the team to develop the game because of China's potential huge market, and Sonic Team being unavailable at the time with the Hedgehog 2 Engine, Sonic Runners, and Sonic Forces.
At first, it was just an SA1 Remake with visuals like Sonic Generations. However, after Sega being impressed with their work, they granted SA2 to get a remake as well. The cast would've had the Modern Voice Cast and Writers, like in Sonic Generations & Lost World.
Along with this, the game was even on a poster in E3 2014, but not giving any name about it.
However, in January 2015, the head of Sonic Team, Takashi Iizuka announced that development had restarted under a new studio called Paradox Crystal. Takahashi said that the previous studio had not met Sega's standards and that the decision to restart the project was not taken lightly. Paradox posted a job advertisement seeking storyboard artists in October 2015, seeking people to work on "emotional" and "interesting and innovative scenes that elevate the narrative". Video Games Chronicle took this as an indication of a more cinematic focus.
With the change in studio, Sonic Adventure: Episode I - The Chaos Saga became the first project by Paradox Crystal, a Sega studio founded in 2014 in Santa Monica, CA by Matt Tieger, he alongside 120 additional employees, came from Luxoflux and High Moon Studios, after they were laid off or fired from both studios' parent company, Activision
== Downloadable content ==
Sonic Adventure: Episode I - The Chaos Saga received additional content in 2022:
* Update 1
* Update 2
* Update 3