Play sonic games

Definition of sonic: having to do with the velocity (speed) of sound (specifically as opposed to ultrasonic, qv).

Definition of game: a contest with rules to determine a winner; "you need four people to play this game"

Where should you go to play sonic games? There are some internet adresses like http://www.sonicstadium.org/games/
or http://www.arcadetown.com/sonichedgehog/playgame.asp or http://www.freeaddictinggames.com/game/adventure-games/sonic-the-hedgehog.html or
http://www.arcadegames.nu/