: To unlock the Sound Test, you must beat the Time Attack special stages in under 4 minutes. Once unlocked, specific code combinations reveal hidden screens.
: Entering code 46-12-25 in the sound test displays a screen with distorted Sonics and a message in Japanese that translates to "Fun is Infinite — Sega Enterprises" . Sonic CD PSN
: You can currently play the remastered Sonic CD as part of the Sonic Origins Plus collection on PS4 and PS5, which includes all the features of the PSN version plus additional content. : To unlock the Sound Test, you must
: This version used Christian Whitehead’s Retro Engine , which provided a smooth 60fps experience, widescreen support, and the ability to play as Tails . : You can currently play the remastered Sonic
: The standalone digital version was delisted from the PlayStation Store in May 2022.