Roadkiller is one of the Achievements (Xbox 360) /Trophies (PlayStation 3) in Tomb Raider Underworld.
To obtain the trophy/achievement the gamer must overrun a single enemy with the motorbike. A good opportunity for this are the Jaguars in the Mexico Section and the Thralls in the Jan Mayen Section.
Roadkiller is a Bronze Trophy on the PlayStation 3.
Kill an enemy by running over it with the motorcycle.
Roadkiller is worth 5 Gamerpoints on Xbox 360.
Killed an enemy by running over it with the motorcycle.