The Pre-[[Sega Dreamcast]] era of [i][[sonic_(series)|Sonic the Hedgehog]][/i]. May also apply to mainline works that use the art style and characters common to this era.

h4. Main Games
* [i][[Sonic the Hedgehog 1|Sonic the Hedgehog]][/i] (1991, Genesis, Game Gear, Master System)
* [i][[Sonic the Hedgehog 2]][/i] (1992, Game Gear, Master System)
* [i][[Sonic CD]][/i] (1993, Sega CD)
* [i]Sonic Chaos[/i] (1993, Game Gear, Master System)
* [i][[Sonic the Hedgehog 3]][/i] (1994, Genesis)
* [i][[Sonic & Knuckles]][/i] (1994, Genesis)
* [i][[Sonic Triple Trouble]][/i] (1994, Game Gear)
* [i][[Knuckles' Chaotix]][/i] (1995, 32X)
* [i][[Sonic Mania]][/i] (2017, Switch, Xbox One, Playstation 4, Steam)

h4. Spinoff Games
* [i]SegaSonic the Hedgehog [/i] (1993, Arcade)
* [i]Sonic Spinball[/i] (1993, Genesis)
* [i]Sonic Drift[/i] (1994, Game Gear)
* [i]Sonic Drift 2[/i] (1995, Game Gear)
* [i]Tails' Skypatrol[/i] (1995, Game Gear)
* [i]Tails Adventure [/i] (1995, Game Gear)
* [i]Sonic Labyrinth[/i] (1995, Game Gear)
* [i][[Sonic the Fighters]][/i] (1996, Arcade)
* [i][[Sonic 3D: Flickies' Island]][/i] (1996, Genesis, Saturn)
* [i]Sonic R[/i] (1997, Saturn, Windows)

h4. Adaptations based on this era
* [i][[Adventures of Sonic the Hedgehog]][/i] (1993)
* [i][[Sonic the Hedgehog (SatAM)]][/i] (1993)
* [i][[Sonic the Hedgehog (OVA)]][/i] (1996)
* [i][[Sonic Underground]][/i] (1999)
* [i][[Sonic Mania Adventures]][/i] (2018)