The way I got it was Spoiler: Click here to viewif ya killed Playboy X and have his place, go on the roof and get things started by sniping a couple people. Then when the cops come toss some grenades/rocket launcher to blow up their cars. There's a object between the fire escape and the apartment that you can hide behind. The cops don't come all the way up for some reason, they seem to stop on the other side of the fire escape, so you can pick them off from behind the cover. When the hjelicopter comes just pick off the two gunners<or blow it if ya have rocket launcher, I didn't have it when I did it so I just sniped the gunners> When the attack copter comes for some reason it can't seem to get a shot on ya so just keep killing cops till ya hit 6 stars and wait for the time to come.