This title is a remaster of the classic platform adventure, featuring enhanced controls and widescreen support while preserving the original's core time-traveling mechanics where you alter levels across past, present, and future eras. Distinctive features include the option to switch between the American and Japanese soundtracks, and Tails is included as an unlockable character. This version modernizes the presentation of the beloved 2D experience.
This iteration significantly updates the presentation and controls of the original game. Key enhancements include support for modern widescreen displays, offering a clearer and more expansive view of the action. Furthermore, the control scheme has been modernized for greater precision, addressing common feedback from the original release.
One of the most notable additions is the inclusion of selectable soundtracks. Players have the option to switch between the original Japanese soundtrack and the American soundtrack, allowing for a personalized auditory experience. Visually, the game maintains its iconic sprite-based aesthetic while benefiting from updated presentation elements.
The game centers around fast-paced platforming, demanding precise movement and momentum management. A central mechanic involves finding specific poles within the levels that allow the player to break the time barrier, transporting them to different eras of the same zone. Successfully completing objectives in the past often results in a brighter, more technologically advanced future level.
Beyond the main adventure, this remaster includes additional content that expands replayability. Notably, the character Tails is available as an unlockable playable character, offering a different way to experience the established stages.
This remastered version is widely accessible, available across numerous platforms including PC (Microsoft Windows), various generations of PlayStation (PS3, PS4, PS5), Xbox consoles (Xbox 360, Xbox One, Xbox Series X|S), mobile devices (iOS, Android), and the Nintendo Switch. It is important to note that this release is a standalone remaster; there are currently no announced downloadable content packs or expansions associated with this specific version.

This mod returns the scrapped levels of the Sonic CD: Dubious Depths, Baneful Badland (reimagined Desert Dazzle) and Final Fever. Levels become part of the main game, not additional levels. They are made according to existing information and concepts about them, but at the same time, the mod does not try to authentically and accurately recreate the levels, but is a free interpretation of the author. All level's assets and objects are custom. The mod has a little customization of names and level music; some of the music was written specifically for the levels, while others were borrowed from other authors, most of whom are part of the team.

As the earliest remastered of the classic Sonic Titles, Sonic CD has fewer changes and features compared to later remasters and Origins. The purpose of this mod is to bring Sonic CD more in-line with the later remasters/Origins by adding several new features/options originally available in other mods.

A mod that adds Metal Sonic and Amy Rose to Sonic CD as playable characters, with their own movesets and changes to the story scenes, bosses and more.

Sonic CD Restored is a speedrun mod that restores lost Sega CD speerun routes and features back to the game as well as polishes the video/audio/gameplay by restoring fidelity, fixing bugs, and providing small quality of life improvements. These changes do not move away from the spirit of the original game, so there aren’t new gameplay features like Flight Cancel...however Time Travel Overhaul is incorporated with permission purely because it was the original game designers’ intent for No Loading Time Travel to be featured. This has also been tweaked and polished to be as closely representative of how Sega would have made it work themselves.

A decompilaton of Sonic CD (the 2011 remaster version, using the mobile version as a basis) for computers. This mod adds a built-in mod loader and technical improvements over the officially released version of the remaster for PC.