Sonic's SPD clocked in Cool Edge.

SPD is a game mechanic that appears in the Xbox 360/PlayStation 3 version of Sonic Unleashed. It is a speed measurement used to rate Sonic's velocity in daytime Action Stages.


Whenever Sonic passes a Star Post during daytime Action Stages, the checkpoint will clock how fast Sonic is going and measure his velocity in SPD.


  • It is unknown if "SPD" is an abbreviation of the word "speed", a recurring measurement for velocity in the Sonic Riders series, or an acronym.

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