Railrazor (not related to
this guy) is a twin brother to
Astrotrain. It was known that both of them signed up for
Shockwave's triple changer experiment to enhance their abilities in battle. However, sensing his benevolent spark slowly eroded by this experiment, he escaped Shockwave's lab but failed to save Astrotrain from the same fate , as his escape was quickly discovered by Shockwave. He lived as a fugitive ever since in the depths of Cybertron (and sometimes flew above radar detection as a space shuttle (with stealth mode activated).