"The Adventures of Tom Sawyer is a video game for the Nintendo Entertainment System in 1989 by Seta and was based upon the book The Adventures of Tom Sawyer by Mark Twain.
Tom Sawyer is dreaming, and in this dream he must save Becky from Injun Joe, he must travel through six stages to get to her. He encounters various creatures including a Giant Octopus, a Giant Aligator in the Mississippi River, Ghosts and Ghouls in a haunted house, God, and a dragon. He wakes up from the dream and finds himself in his Mississippi classroom. He finds a feather on his desk. The feather that belonged to Injun Joe. Was it a dream...?
The Adventures of Tom Sawyer is a platformer similar to Super Mario Brothers, wherein one plays as Tom Sawyer. The game is not to be confused with Square's Tom Sawyer."
Source: Wikipedia, "The Adventures of Tom Sawyer (video game)", available under the CC-BY-SA License.