Sega has revealed it has no more plans to continue Sonic 4 beyond the upcoming Episode II.
The first episode of the download-only platformer was released way back in 2010, and the second is due for release later this year.
Beyond that, there will be no more outings for Sonic 4, according to Digital Spy.
"We are looking forward to hearing the feedback from the users for Episode II, but we are currently not planning to release another episode," producer Takashi Iizuka told the site.
"We just want to see how the users accept this episode."
The Sonic 4 series was billed as a true sequel to the classic '90s Sonic The Hedgehog games titles.
Sonic The Hedgehog 4: Episode II will be released for Xbox Live Arcade, PSN, PC, iOS, Android and Windows Phone. While the first entry was available on WiiWare, Sega has confirmed there are no plans to release Episode II on Nintendo's console.