How many Sonic games have you actually beaten?

Sonic 1
Sonic 2
Sonic 3&K - at the moment; Sonic alone - all emeralds, game complete. Tails alone - 7 CE, 3 SE, Sandopolis. Knuckles alone, all emeralds, game complete. I've yet to clear the game with Sonic and Tails together.
Sonic 1 GG/MS
Sonic CD
Sonic '06 - I was surprised to learn it could be completed
Sonic Adventure
Sonic Adventure 2
Sonic the Fighters
Sonic R

 

I always say "all the games I played on real hardware" and forget that I also have beaten SegaSonic, which I didn't play on real hardware =P

 

Sonic 1 (16-bit) with 6
Sonic 1 (8-bit) with 6
Sonic CD with 7
Sonic 2 (8-bit) with 6
Sonic Chaos with 6
Sonic Triple Trouble with 6
Sonic Labyrinth
Sonic Blast with 6
Sonic Spinball (16-bit)
Sonic 2 (16-bit) with 7
Sonic 3 & Knuckles with 14
Knuckles' Chaotix with 7
Sonic 3D (16-bit) with 7
Sonic World
Sonic R with 7
Sonic Adventure DX with 130 / 60
Sonic Adventure 2 Battle with 180

I sort of stopped there - haven't cleared any of the more recent ones though I own a few of them

 

Sonic 1, 2, 3, Knuckles, CD, 3d Blast, Spinball, Adventure, Adventure 2, Advance 1, 2, and 3, Sonic Battle, Sonic Rush, Rush Adventure, 06(cringes), and Unleashed.

17 games total.

 

Sonic 1, 2, 3, Knuckles, CD, 3d Blast, Spinball, Labyrinth, Chaos, Tripple Trouble, Adventure, Adventure 2, Shuffle, Advance 1, 2, and 3, Sonic Battle, Sonic Rush, Rush Adventure, and 06

 

Sonic the Hedgehog (All Emeralds)
Sonic the Hedgehog 2 (All Emeralds)
Sonic the Hedgehog 3 (All Emeralds)
Sonic the Hedgehog 3 & Knuckles (All Emeralds)
Sonic the Hedgehog CD
Sonic Adventure
Sonic Adventure 2
Sonic the Fighters
Sonic R
Shadow the Hedgehog
Sonic Advance (All Emeralds)
Sonic Advance 2
Sonic Advance 3
Sonic Unleashed [Wii] (Working on getting all medals.)

 

Sonic 1(all)
Sonic 2(all) with Sonic and Tails mode
Sonic 3(all), & Knuckles(all)(with Knuckles) 3&K(all)(S,T,S&T)
Sonic Spinball(I got lucky and somehow activated unlimited lives cheat on last stage and life)

Sonic 3d (good end) (Genesis/Mega Drive and Saturn version)

Sonic Adventure
Sonic Adventure 2
Sonic Heroes

Sonic Advance
Sonic Advance 2(all, everyone)
Sonic Advance 3(all)

Sonic Rush
Sonic Rush Adventure

Sonic Secrets Rings

 

...there exists a Sonic fan who is just too devoted. =P

 

Endri: You're still missing one: "Sonic the Hedgehog into Dreams..."

 

Call it "having nothing better to wastespend my time with" ^_^
I usually do it will all the series I like the most, like Sonic, Silent Hill, Shin Megami Tensei, Star Ocean... etc

I was unsure if I should add Chistmas NiGHTS to the list, since it doesn't take along the name "Sonic" in the title.

 

Master System
Sonic The Hedgehog 1 All emeralds
Sonic The Hedgehog 2 All emeralds

Mega Drive
Sonic The Hedgehog 1 All emeralds
Sonic The Hedgehog 2 Sonic: All emeralds, Tails: All emeralds
Sonic The Hedgehog 3 Sonic: All emeralds, Tails: All emeralds, Sonic & Tails: All emeralds
Sonic & Knuckles Sonic: All emeralds, Knuckles: All emeralds
Sonic 3 & Knuckles Sonic: All emeralds & super emeralds, Tails: All emeralds & super emeralds, Knuckles: All emeralds & super emeralds, Sonic & Tails: All emeralds & super emeralds
Sonic 2 & Knuckles All emeralds
Sonic 3D All emeralds

 

Sonic 1 - all emeralds
Sonic 2 - not all emeralds
Sonic 3 - all emeralds, all characters
Sonic & Knuckles - all emeralds, all characters
Sonic 3D Blast - all emeralds

S2 special stages are hardcore compared to the other games :D

 

Megadrive
------------
Sonic 1 - All Emeralds
Sonic 2 - All Emeralds
Sonic 3 - All Emeralds
Sonic & Knuckles - All Emeralds
Knuckles in Sonic 2 - All Emeralds
Sonic 3 & Knuckles - All Emeralds
Blue Sphere - Reached over level 1000, but can you honestly complete 100 million levels?
Sonic Adventure - All tokens
Sonic Spinball
Sonic Advance
Sonic Advance 2
Sonic Advance 3
Sonic Unleashed (PS2)
Sonic CD

 

Sonic the Hedgehog 2 (Game Gear) - Both not all emeralds & All Emeralds
Sonic CD - Not all Time Stones
Sonic Adventure DX
Sonic Adventure 2 Battle
Sonic Advance 2
Sonic Advance 3
Sonic Rush

 

Sonic 1 16-bit with all emeralds
Sonic 2 16-bit with Sonic only, and all emeralds
Sonic 3 & Knuckles with all Super Emeralds, with Tails and then Sonic
Sonic CD with good ending (not through Time Stones, by manually destroying all capsules)
Sonic 3D Blast with all emeralds
Sonic 1 8-bit with all emeralds
Sonic Chaos with all emeralds
Sonic Advance with Amy and Sonic (no emeralds, ever)
Sonic Advance with Sonic (again no emeralds)
Sonic Advance 3 (again, no emeralds lol)
Sonic Adventure (with Super Sonic, not all emblems)
Sonic Adventure 2 (Last Side included, not all emblems)
Sonic Heroes (all four teams, not Last Mode)

I think that's all. D=