Ultimate Flash Sonic unblocked is a flash action game that is the updated version of the Sonic the Hedgehog in Flash platform.
The game is very addicting and contains a variety of unique elements and characters derived from the original Sonic for Sega.
The gameplay involves 4 playable characters which you are required to control using the arrow keys, space to jump and down and space to turbo power-up of the character.
There are also 2 more secret characters in which players are required to unlock by successfully completing the levels.
The game is backed by a password server and hence you are not required to start it over from the beginning.
There are different levels in the unblocked Ultimate Flash Sonic game in which players are required to cross successfully to win the match.