Sonic the Hedgehog CD (Dec 4, 1992 prototype)

Play retro game Sonic the Hedgehog CD (Dec 4, 1992 prototype) on your browser free.

Here's a guide on how to play Sonic the Hedgehog CD:

1. Objective:
- Navigate through levels, defeat Dr. Robotnik (Eggman), and save Little Planet

2. Controls:
- D-pad: Move Sonic left or right
- A/B/C button: Jump
- Down + Jump: Spin dash (roll into a ball to gain speed)
- While moving, press and hold Down: Sonic will curl into a ball

3. Unique Time Travel Mechanic:
- Find "Past" or "Future" signposts
- Maintain top speed for a few seconds to activate time travel
- Travel to the past or future versions of each stage

4. Gameplay:
- Run through levels, collecting rings for protection
- If hit, you'll lose your rings
- Defeat enemies by jumping on them or using spin dash
- Find and destroy robot teleporters in the past to create good futures

5. Zones:
- 7 zones, each with 3 acts (2 regular acts + 1 boss act)

6. Special Stages:
- Destroy UFOs in a 3D environment to earn Time Stones
- Access by finding a "Special" icon with 50+ rings and jumping through it

7. Time Stones:
- Collect all 7 Time Stones for the good ending
- Alternatively, create good futures in all zones

8. Metal Sonic:
- Race against Metal Sonic in Stardust Speedway Zone

9. Tips:
- Use the spin dash for quick starts
- Explore past and future timelines for different experiences
- Collect rings for protection and extra lives
- Pay attention to your surroundings for hidden paths and secrets

10. Goal:
- Complete all zones
- Defeat Dr. Robotnik
- Aim for the good ending by either collecting all Time Stones or creating good futures in all zones

Remember, Sonic CD is known for its unique time travel mechanic and more exploration-focused gameplay compared to other classic Sonic games. The soundtrack also changes between past, present, and future versions of stages.

Use arrow key and try some key ( Shift, Enter, Z, X, A, S , Q, E, R, T, G, F, H ) to controls the game.