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
Every Mainline Sonic The Hedgehog Game In Chronological Order
Sonic Generations, Sonic Wiki Zone
List of All Main Line Sonic Games in Order
Every Mainline Sonic The Hedgehog Game In Chronological Order
Tier list of every mainline sonic game. Is my list valid? : r/SonicTheHedgehog
List of All Main Line Sonic Games in Order, sonic origins list of games
Sonic Frontiers - Wikipedia
cohost! - #there are of course other good sonic games that i love but the space is limited