In Sonic CD Classic gameplay, players control Sonic the Hedgehog as he zooms through levels, collecting rings, defeating enemies, and trying to reach the end goal. The game is known for its fast-paced action, loop-de-loops, and branching paths that allow players to explore different routes and discover hidden secrets. Sonic CD Classic also features time travel mechanics, allowing players to travel between past, present, and future versions of each level, which can impact the layout and obstacles within the stage. Players must use Sonic's speed and agility to navigate through the levels, defeat Dr. Robotnik's robots, and ultimately save the day.

Sonic CD Classic is a timeless video game that features the iconic character Sonic the Hedgehog. Some of the key features of this classic game include: 1. Time travel mechanic: Players can travel between past, present, and future versions of each level to explore different gameplay experiences and discover hidden secrets. 2. Retro graphics and sound: Sonic CD Classic stays true to the original game's 16-bit visuals and nostalgic sound effects, giving players a blast from the past. 3. Challenging levels: With unique level designs and obstacles, Sonic CD Classic offers a fun and challenging gameplay experience for both new and longtime fans of the franchise. 4. Multiple endings: Depending on players' actions throughout the game, they can unlock multiple endings and achieve different outcomes for Sonic and his friends. 5. Bonus stages: Players can access special bonus stages to collect Chaos Emeralds and unlock new abilities for Sonic. Overall, Sonic CD Classic offers a mix of classic platforming action, time-traveling gameplay mechanics, and retro charm that continues to captivate players of all ages.