Sonic Adventure

Console
Sonic The Hedgehog (1991) | 2 | CD | 3 | Sonic & Knuckles | 3D Blast | Adventure | Adventure 2 | Heroes | Sonic the Hedgehog (2006) | Unleashed | 4: Episode I | Colors | Generations | 4: Episode II | Lost World | Mania | Forces

Handheld
Sonic the Hedgehog | 2 | Chaos | Triple Trouble | Blast | Pocket Adventure | Advance | Advance 2 | Advance 3 | Rush | Rush Adventure

Spin-offs

Platformers

Sonic Boom
Rise of Lyric | Shattered Crystal | Fire & Ice

Other
Knuckles' Chaotix | Tails Adventure | Shadow the Hedgehog | Rivals | Secret Rings | Rivals 2 | Black Knight

Racing
Drift | Drift 2 | R | Riders | Riders: Zero Gravity | All-Stars Racing | Free Riders | All-Stars Racing Transformed | Team Sonic Racing

Mario & Sonic
Mario & Sonic at the Olympic Games | Olympic Winter Games | London 2012 Olympic Games | Sochi 2014 Olympic Winter Games | Rio 2016 Olympic Games

Mobile
Jump (Fever) | Dash | 2: Sonic Boom | Runners | Runners Adventure

Other
SegaSonic the Hedgehog | Spinball | Dr. Robotnik's Mean Bean Machine | Sonic Labyrinth | Sonic the Fighters | Sonic Shuffle | Pinball Party | Battle | Chronicles: The Dark Brotherhood

Cancelled games
Sonic X-treme

Animation
Adventures of Sonic | Sonic the Hedgehog (TV series) | OVA | Underground | X | Boom | Feature Film

Printed media
Sonic the Hedgehog (Archie Comics) | Sonic the Hedgehog (IDW Publishing)

Sonic the Hedgehog | 2 | CD | 3 | & Knuckles | 3D Blast | Jam | R | Adventure | Adventure 2 | Advance | Advance 2 | Pinball Party | Battle | Heroes | Advance 3 | Shadow the Hedgehog | Riders | '06 | Secret Rings | Riders: Zero Gravity | Unleashed | Black Knight | 4: Episode I | Free Riders | Colors | Generations | 4: Episode II | Lost World | Runners | Forces

Nights
Nights into Dreams... | Nights: Journey of Dreams

Phantasy Star
Phantasy Star Online | Online: C.A.R.D. Revolution | Phantasy Star Portable

Puyo Puyo
Puyo Pop Fever | Fever 2 | 15th Anniversary | 7 | 20th Anniversary | Tetris

Other games
Ristar | Burning Rangers | ChuChu Rocket! | Samba de Amigo | Billy Hatcher and the Giant Egg | Astro Boy | Sega Superstars | Feel the Magic: XY/XX | The Rub Rabbits!