Walkthrough - Sonic the Hedgehog (Megaforce, September-October 1991)
From Sonic Retro
Walkthrough - Sonic the Hedgehog is a 22 page walkthrough of Sonic the Hedgehog in the September/October 1991 issue of the French magazine Megaforce. It's strange that this issue has pictures of the final game but the issue before it had extremely early images. Besides being image heavy, the issue has a hand-drawn map of Green Hill Zone.
Cheat Section
This is also a small cheat section which is shown a couple pages later: