Here is a list of all of the main line Sonic the Hedgehog games in order of release, including where and how to play them.
The Complete List of Sonic Games in Chronological & Release Order - Cheat Code Central
Sonic The Hedgehog: Every Main Game, Ranked
All Sonic Games in Order of Release Date [List]
Mainline Sonic Games - Sonic Wiki [BETA] - Sonic Stadium
List of All Main Line Sonic Games in Order, sonic origins list of games
heres a tier list of mainline sonic games based on my opinion : r/SonicTheHedgehog
The Complete List of Sonic Games in Chronological & Release Order - Cheat Code Central
Tier list of every mainline sonic game. Is my list valid? : r/SonicTheHedgehog
Sonic Mania, Sonic Wiki Zone
My Mainline Sonic Tierlist (from what I remember) by ETheJumper on DeviantArt
Sonic games tier list
List of All Main Line Sonic Games in Order
Sonic the Hedgehog - A Line Through Time by The4thSnake on DeviantArt
Every Mainline Sonic The Hedgehog Game In Chronological Order