Cars 2: The Video Game

choose any attack mode event, the game doesn't say how much time each car is worth but this achievement is not hard, just run over all of the cubes (question marks, etc) and shoot at the yellow, blue, and red cars.

if shooting missles you should shoot on a straight away or aim ahead of the cars if you are on the curve.

you can use the cheat code start start the game with a laser and you are guaranteed to at least start off with a few kills right away. '123456' is the code.