It's been 6 years since The Great Deluge. Sonic had attempted to fight a watery god known as Perfect Chaos. Sonic killed the beast, but it left the world in a great flood. The entire surface of the world is covered in water, minus a few cities built on high mountains. Boats roam the oceans as gasoline becomes a necessity, that is no longer available...

You stood on the deck of your steamboat, "The Centuries' Voyage", coiling a rope in the corner. The frigid, northern air bit at your skin and gripped at your fingers as you worked. Looking out at the sea, endless blue with bobbing chunks of ice and snowfall stretched out, expansively. Down from the helm came the Captain of the boat, Knuckles the Echidna. He came down the side ladder with his signature blue, tattered sea coat and white captain's hat with a faded yellow anchor on the front. Joining him from the lower deck was Dr. Eggman, wearing a red coat with a brown scarf around his neck. He begins tinkering with his left mechanical arm. Following up from behind the stair was Amy Rose, wearing a leather jacket and jeans. She sat down on a crate on the deck. Knuckles looked at you and the other two.

Knuckles: "Well, we have enough provisions for two weeks, but not enough gas. We need more."

Eggman: "Well, the next town is coming up on Mount McKinley., or what's left of it. There's a town at its peak. Maybe we can somehow get some gasoline there."

Amy: "I'm sure we'll figure something out! We always do, right? The land may have been swallowed, but there are still plenty of mountain ranges here up north for civilization, right?"