There are BILLIONS of sonic fangames you can find online, if I listed them all, it would be greater than 1B characters.
Sonic heroes
No, Mario isn't on sonic the hedgehog game.
If you are referring to Sonic the Hedgehog 2006, then yes, it is the worst. If you are referring to Sonic the Hedgehog for Genesis, then no, as it is the game that started the series.
There's no text based sonic website game as far as I know, but if you like to play a sonic game with others you can try out sonic2online.com
Sonic the Hedgehog 2 (1992)
hes hedgehog
sonic unleashed
Yes, Sonic the Hedgehog (2006) is a three-dimensional game.
Sonic the hedgehog is a video game to Xbox360 and Playstation3. the game is also called Sonic Next-Gen or Sonic 06 to not be mixed up with the first Sonic game.
Sonic the hedgehog 2006
Sonic is a hedgehog.
yes in sega sonic the hedgehog eggman says f*** you sonic