Sonic the Hedgehog Adventure Gamebook 1

Sonic the Hedgehog Adventure Gamebook 1 is a gamebook published by Ladybird in the UK, the first in a series of four. The game follows a rough approximation of the plot of Sonic the Hedgehog 2, including visits to the Emerald Hill Zone, Chemical Plant Zone, Aquatic Ruins Zone [sic], Casino Night Zone, Hill Top Zone, Mystic Cave Zone, Oil Ocean Zone, Metropolis Zone, Sky Chase Zone, Wing Fortress Zone, Special Zone, and finally the battle with Robotnik, though the exact order in which they are visited depends upon the reader.

In a departure from the typical gamebook format, the Adventure Gamebook series has readers count rings, Chaos Emeralds and other such items and sends them to different pages based on their performance, rather than simply having the reader choose from a list of options at the end of each Zone.