UFO

UFO (abbreviation of words Unidentified Flying Object), is an unknown ship, that appears in Special Stages of Sonic the Hedgehog CD. They are large, round-shaped space ships, that are colored as purple and grey with yellow and white flashing lines. There are also second type of UFOs, that are colored Blue instead of Purple with red and white flashing lines. It is unknown who created UFOs, but what is known that, they contain items.

In Special Stages, the player's goal is to destroy all six UFOs from the arena in 100 seconds before the time runs out. UFOs hover around the Special Stage, as Sonic has to Spin Jump on them to destroy them. When Sonic does this, he either gets Super Ring (10 bonus rings) or Sneakers, which gives extra boost to him. The player can have difficulties to hit the space ship, as it can do swerves and the player has to turn around to catch it again. Everytime if the timer hits on 20 second point, the blue type of UFO appears to Special Stage, that contains Time Bonus (increases the timer with 30 extra seconds) after destroying it. After destroying all six UFOs, Time Stone falls down to Sonic's hands and thus Special Stage is completed.

Trivia

 * When the player has completed the game by getting the good ending, the game unlocks DA Garden feature in Sonic CD. In the sky background of DA Garden, there are numerous objects and characters flying across the screen while Little Planet is rotating. One of them is green and yellow flashing space shuttle, that flies on zigzag format over the screen.