In Saints Row: The Third (aka Saints Row 3) for the PC, PS3, and Xbox 360, you can unlock the X2 Phantom motorcycle, which is essentially a copy of the famous light cycle from the Tron movies.
To unlock the X2 Phantom, you need to complete all of the Trail Blazing activities in the Decker district.
You can also unlock the Tron car, which is called The Wraith by doing this.
