Dr. Eggman's new capital city is expanding and only Sonic and his friends can stop it! On a recon mission with the new Diamond Cutters—Tangle, Whisper, and Lanolin—Sonic discovers that the Eggperial City is harnessing the resources around it to grow ever larger. The Diamond Cutters are still getting the hang of working together which leads to trouble when they get trapped. Alone against an army of badniks and a self-replicating city, Sonic calls for back-up and gets more than he bargained for: Tails, Amy, Blaze, and Silver all answer the call, but Shadow, Rouge, and Omega arrive for their own reasons too! While the Diamond Cutters have to have an emotional break-through to escape, Sonic and Tails coordinate a horde of heroes to try to bring the city down! Collects Sonic the Hedgehog issues #57–61.

Sonic battles his nemesis, Robotnik, as the villain traps him with plants, attacks him with a mechanical bomb-throwing monkey, and kidnaps Sally.

Dr. Eggman's new capital city is expanding and only Sonic and his friends can stop it! On a recon mission with the new Diamond Cutters--Tangle, Whisper, and Lanolin--Sonic discovers that the Eggperial City is harnessing the resources around it to grow ever larger. The Diamond Cutters are still getting the hang of working together which leads to trouble when they get trapped. Alone against an army of badniks and a self-replicating city, Sonic calls for back-up and gets more than he bargained for: Tails, Amy, Blaze, and Silver all answer the call, but Shadow, Rouge, and Omega arrive for their own reasons too! While the Diamond Cutters have to have an emotional break-through to escape, Sonic and Tails coordinate a horde of heroes to try to bring the city down! Collects Sonic the Hedgehog issues #57-61.

After all the excitement of his recent adventures, Sonic's ready for a break--NOT! The thuggish twosome, Rough and Tumble, are back and they're looking for vengeance against Sonic and his friends. And they're not the only ones... some of Sonic's greatest foes have returned and, with the help of some new evil allies, have created a threat that's guaranteed to take over the world. Even Sonic can't outrun a Virus for too long. Collects issues #13-16.

It's all come down to this, but will Sonic be able to overcome the odds and emerge victorious? The world has completely fallen to the Metal Virus. Sonic the Hedgehog and his friends find themselves on Angel Island, the last safe place, launching a desperate plan with their old foe, Dr. Eggman, to defeat the Deadly Six and reclaim the Chaos Emeralds in a last-ditch effort to save the world. Collects Sonic the Hedgehog issues #25-29.

Can Sonic save a city in crisis... or has he finally met his match? Dr. Eggman has launched his most extreme plan yet, and Sonic's already racing to catch up! As Dr. Eggman drowns entire cities in his Metal Virus, creating hoards of Zombots—civilians infected with the virus to become zombified machines—Sonic himself struggles to keep his infection in check! And when Sonic's friends start falling victim, it's clear no one is safe! Collects issues #17–20 of the Sonic the Hedgehog series.

The world has fallen to the Metal Virus, a manufactured plague that transforms all it infects into robotic zombies at Dr. Eggman's command. Even Sonic the Hedgehog has been infected, though his speed has allowed him to keep the virus at bay. Now, Sonic and his friends in the Restoration launch a desperate plan to cure the world! Collects issues #21-24 of the ongoing Sonic: The Hedgehog series.