Crackdown

I used Timbol Time trial for this. You must defeat a boss before you can do their time trial. Time trial is accessed from the main menu. When you choose timbol, a infinite amount of cars will spawn, just jack one, then get out after the door closes, then run away as the gang will shoot you. DONT SHOOT BACK. if you do the gang members in cars will get out before you can jack them. The members in the car you jacked as well as any gang cars near you, will get out to hurt you, but if your run down the street, they will ignore you, and you should run into another car as your running away from the first one, letting you gain another jack count.

Or, there is a quicker way, which is detailed in the video below. Its the Diaz Time Trial from the Los Muertos boss's. When you run out of cars to jack, kill yourself or kill diaz, and start over. Eventually youll get the achievement.

Rafael Diaz is your friend.

Go to Time Trial mode and pick Diaz as your boss. You'll go inside of his little stadium and a bunch of guys will go after you. Not to mention a bunch of guys driving cars.

Just yank them out of the car and go in. Drive for a second and get out. Do this as many times as you can (it'll be different every time, since gang members will not hesitate to shoot at their allies in the car while you are trying to get to them. Not to mention blow the car up).
After you can't steal any more gang-controlled cars, kill Diaz and start anew.

Diaz is a good method, I prefer to do it without the bullets flying and needing to constantly restart though. Not to say it's hard, just annoying. When I was going for this achievement last night, I was also doing Confiscator at the same time.

The key, is to NOT fire a single bullet or even run over a gang member. Just yank them out and drive for a second (was paranoid that not driving for that second doesn't count towards achievement), get out and repeat. The passenger will fire on you of course, but unless another car/gang member is really close, no one else will.

I've actually jacked one car, drove for my second and got out to another one right away. As if the second car didn't even notice the jack.

Again, don't fire a shot and bring attention to yourself. Kind of hard to jack cars when the enemy gets out as soon as they see you from a distance.

Okay guys listen up you have to make sure you are jacking "Gang Controlled Vehicles". This simply means that the car you are after has to have a gang icon above it. So when you are in the big "Durby Room" with Diaz only the three cars count. As they are the only ones with the icon above them. The big tow like looking trucks (about four of them) do not count towards the achievement.

Go under Shai-Gen after you beat Timbol, and use her trail. This is ten times easier here. Basically you start out on the road with the notoriety meter locked at zero. Which means the gang members will pay little or absolutely no attention to you.

Just as all the other guides state do not shoot or kill anyone and you should be fine. The only time the other gang members noticed me is when I was stealing one of there buddies vehicles right in front of them. In which case they would get out and shoot at me. Easily fixed by driving a little way away; then, finding the next car to steal on the way.

I wasn't able to get this playing through the campaign instead it was easy in time trial.

Time Trial: Timbol

• Keep running around and jacking cars with enemies in them without shooting anything.

• Took me around 30 minutes for 75.