Sonic the Hedgehog 4: Episode 1 and Episode 2 are now available on Ouya. Episode 1 allows Ouya owners free access to the Splash Hill Zone, while Episode 2 offers up its first two stages gratis. Each episode costs $6.99 to unlock the full experience.
Sega previously revealed that 1993's Sonic CD, arguably the peak in the series, would launch on Ouya in June, but that obviously didn't happen. Instead, we're left to expect Sonic CD on the Ouya "soon," per Sega of America's latest update.