Grand Theft Auto IV Walkthrough

When you head to Ray's restaurant on Denver Avenue, you'll find him talking on a cell phone. But when he gets off, he immediately storms into the restaurant's kitchen and begins to scold Niko for not being there sooner, while he has to sit on the diamonds by himself. The two argue, and Niko decides to stick up for himself, telling him that continue to work for him, he needs a guarantee that he will help Niko find someone he's been looking for. The two finally agree, and then Ray gives Niko the rocks and instructions to meet another one of his contacts at a nearby museum.

Once outside, jack a car and begin heading north to your location, a museum off of Columbus Avenue in Algonquin, a huge building that juts into Middle Park. You can basically take Columbus Avenue almost the entire way there (though you'll need to take a detour around construction), so it should be a straight shot. Once you arrive, ditch your car and head around back, where you'll meet up with Johnny, a familiar face we met earlier in the game. He'll bring you inside, where the interested parties will examine the rocks. But then, one is gunned down, and a third, hostile party will make itself known. To get out of here alive, you're going to have to fight your way out.

Wield your most powerful weapon and begin using the various cover (much of it priceless, sadly) to block enemy bullets from hitting their targets. You're on the second floor catwalk that overlooks the first floor, so the general idea here is to first clear the second floor of enemies, and then turn your ire on the foes down below in order to thin out their ranks before you proceed. How so many armed foes are inside of the museum blowing everything up without anyone noticing is beyond us, but nonetheless, make sure each and every enemy on the second floor is slain before heading to the first (so that none sneak up behind you later), and of course, thin out the enemy ranks below. This will help you significantly in just a moment.