|title=Sonic the Hedgehog 4 Episode I (Sony QA Network prototype)
Sonic the Hedgehog 4: Episode 1 (Sony QA Network prototype) is an early version of Sonic the Hedgehog 4: Episode 1 which was released on the Sony's QA Network before the release of the game. It was not released to the general public but info about it can be found online. It is suspected to be largely the same as the Xbox Live and WiiWare prototypes.
A YouTube video about this build was provided by Techokami on February 13th, 2010 on the Sonic Retro forums. Further information was released later in the thread by sonic4dude.
Act 2 contains the controversial Mine Cart level where Sonic remained in the cart throughout the level, which controlled poorly. It is controlled using the PS3's sixaxis motion control function. The Mine Cart section is reduced greatly and plays automatically in the console version.
Unlike the final build, the Special Stage is played by using sixaxis motion control controls. In the final build sixaxis motion control is merely optional as the default controls use the analog stick instead.