Some games block being embedded. If the frame above stays blank, play Ultimate Flash Sonic on its own site.
Play Ultimate Flash Sonic
Ultimate Flash Sonic is a 2-D side scroller made by Dennis-Gid. It was uploaded to Newgrounds on Febuary 21, 2004.
Also playable now
Play something else
PlayableCall of Bieber
Newgrounds · 2011
PlayableAlice is Dead: Episode 3
Newgrounds · 2010
PlayableAlice is Dead: Episode 2
Newgrounds · 2010
PlayableBlaze the Cat Dress Up
Newgrounds · 2009
PlayableAlice is Dead: Episode 1
Newgrounds · 2009
PlayableBall Revamped III: Andromeda
Newgrounds · 2005
PlayableBall Revamped III: Gemini
Newgrounds · 2005
PlayableBall Revamped 2: Metaphysik
Newgrounds · 2005
PlayableCastle Cat 3
Newgrounds · 2004
PlayableAlien Hominid
Newgrounds · 2002