Thirteen

Thirteen was the first coaster with Vertical Drop Track, a feature where the train and the track drop together. As of 2017, four other coasters have Vertical Drop Track:

Polar X-plorer at Legoland Billund in Denmark. Built in 2012 by Zierer.
Verbolten at Busch Gardens Williamsburg in Virginia. Built in 2012 by Zierer.
Wonder Mountain's Guardian at Canada's Wonderland in Ontario, Canada. Built in 2014 by ART Engineering GmbH. (Pictures coming soon)
Darkmare at Cinecittà World in Italy. Built in 2014 by Intamin.

Thirteen roller coaster at Alton Towers