SEGA has decided to "extend the development of" Sonic the Hedghehog 4: Episode 1. The download game will now be released in "late 2010" instead of this summer.
The publisher also announced that the retro 2D revival will be coming to iPhone and iPod Touch as well as XBLA, PSN and WiiWare.
"The additional time will allow the Development Team to focus on ensuring overall high quality throughout the game by continuing to tune, balance, and maintain the kind of polish that an important title like this demands, and ultimately providing fans with an unrivalled classic Sonic feel," says the press release, which you can find at the SEGA Europe blog.
Read more in our recent Sonic 4 hands on.