Diamonds Are a Girl's Best Friend
Diamonds Are a Girl's Best Friend is the final mission for the McReary Family, particularly Packie and Gerry. In this mission, Niko Bellic and Packie McReary visit a deal on Charge Island where they attempt to exchange a gagged Gracie Ancelotti for some diamonds that Ray used to have.
Niko and Packie offer to give the Ancelottis back their daughter, Gracie in exchange for some diamonds that Ray Boccino used to have. The deal is botched, and Rodislav Bulgarin's men steal both the diamonds and the girl. The men working for Bulgarin get rid of the diamonds. In retaliation, Niko and Packie kill the goons responsible then go home.
Drive into the yellow marker at the exchange point, which is an abandoned oil factory. A cutscene shows the deal. The deal becomes botched when Rodislav Bulgarin steals the diamonds and Gracie Ancelotti, so basically Packie and Niko lose everything.
Gain cover and shoot Bulgarin's men. There are about a dozen, so take your time. Use a grenade only when Packie is far from the detonation point. Once the nearby men have been wiped out, get closer and ambush the remaining ones. Follow Packie to the hallways above ground. There will be a lot of men on the aboveground hallways so use the pipes as cover.
Packie and Niko will split up with Niko taking the low "road" and Packie taking the high "road." The view will focus on three cars that skid on the ground nearby. Take a rocket launcher or a few grenades and blow up the three cars before the men can seperate and cause a big problem.
Meet back up with Packie and corner the two men with the diamonds. Watch as the men drop the diamonds into a garbage truck below. Packie says multiple swear words to the men and then gets out his gun. Help Packie kill the men then slide down the ladder. Drive Packie to his Mom's house in Meadows Park, Dukes. On the way, Packie will try to figure out what happened at the deal.