Sonic the Hedgehog has been defeated by a powerful mysterious being known as Infinite, who has been altered and corrupted by Dr. Eggman using a mysterious gem, known as the Phantom Ruby. After his defeat, Sonic disappears, leaving Eggman free to conquer 99% of the world with a massive robotic army and his new allies, who are lead by Infinite. During his takeover, Knuckles the Echidna forms a resistance group to rebel against Eggman's rule. The resistance must find Sonic, defeat Eggman's army and liberate the world from his clutches, before Eggman's plan completes in 3 days, which will exterminate all of the members of the resistance forever.
Join the Resistance
Did You Know?
This is the first main series Sonic game to feature playing as a character that isn't some form of Sonic, since Sonic the Hedgehog
(2006). See more
In the English version, Knuckles says, "Tails has just lost it". This is actually a mistranslation of the original Japanese line, "Tails is lost". See more
E-123 Omega here. Extermination proceeding without incident. No problems to report.
Rouge the Bat
Extermination? This is supposed to be a recon mission! You can't go making a big scene!
Shadow the Hedgehog
You should have known better than to have sent Omega on an op like this.