Special Stage (Sonic the Hedgehog CD)

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The special stages in Sonic CD are slightly different to the usual Sonic special stages. They use a pseudo Mode-7 effect, and parallax backgrounds. Rather than collect a certain amount of rings or items, you have to destroy all of the UFOs flying around in the sky. When there is 20 seconds remaining, a blue UFO will appear. If destroyed, 30 seconds is added to the timer. Touching the water increases the speed of the timer.

Once all the UFOs are destroyed in the given time limit Sonic will receive a Time Stone (instead of a Chaos Emerald). If all of the Time Stones are acquired by the end of the game, all Futures automatically become Good and the good ending will be played when the game is completed. The good ending can be reached also if a player manages to complete the good future levels in every zone.