Earth Defense Force: Insect Armageddon

Throughout each of the maps on Earth Defense Force there are multiple vehicles parked in the streets. These vehicles will all blow up with about 1 or 2 shots from the assault rifle or of course one explosion will take out multiple cars from a rocket or grenade launcher.

The best way to go about this is to simply unload on all vehicles you come across on your way between objectives during the campaign / any you may see during survival.

This is the type of achievement where if you are going for completion or even a fair score in the game as a whole it is bound to unlock eventually simply because of the number of cars that get in the way of your firefights. I personally hadn't even noticed the achievement and won it after 2 playthroughs. Though to quicken the process, simply unload your rockets / assault rifle in to any vehicles you come across and I'm sure it could be done in 1 playthrough with a little survival added in!