Sonic the Hedgehog, Vol. 4: Infection

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.