This article is for the digital manuals of Sonic Mania.
The story prologue found in the digital manual:
- A Disturbance on Angel Island
- Discovering a sudden dimensional breach in the atmosphere, evil genius Dr. Eggman detected a unique wave signature emanating from Angel Island. Realising that it could be a source of unspeakable power, he immediately dispatched his elite robot minions—the Hard Boiled Heavies (HBH)—to retrieve it.
- Meanwhile, Sonic and Tails were also tracking the signal but arrived a little late to the party—the HBH were already there, excavating a mysterious gemstone out of the ground. As they did so, space time suddenly warped around them, catapulting them all to the Green Hill Zone.
- As the HBH rush to deliver the gemstone to Dr. Eggman, it’s up to Sonic, Tails & Knuckles to stop them.
- Don't let the Phantom Ruby get into the wrong hands!