Edit for update of 31/01/2019
Last requirements are 1500 kills, but since the update of January 31 2019, it now 250 kills
For this achievement, I have 4 pads, and a lovely wife for help me. It possible alone, and with only 2 or 3 pads, but need very long time.
Go split screen, deathmatch, add pads, select number of pads (players), time’s limit 30 mns, 50 kills, engine wild and difficulty easy. In the video, I drive the car gift when you hit level 30, the Nyvoss Spectre XI.
For the track, basin is perfect, with a big tree for park 3 cars in the trunk
On the video, my wife drive each 3 red cars on the trunk of this tree, while i drive my black car for collect bonus. If it’s a shield, I load it with a weapon.
If you have someone for help you, like on my video, you can kill 50 cars for 25-30 mns (our best was 23 mns for 50 kills)Info:
Once campaign was finished, i had 60 kills on total
Hope this help
Sorry for my english, i’m french