Grand Theft Auto IV Walkthrough

When you arrive at your destination, a plethora of red dots will appear on your HUD. These represent all of the enemies in the area, and naturally you're going to need to eliminate them all, not only your intended target. Thankfully, as seen in the screens below, there's a great place to begin firing upon as the driveway slants upwards. You can peek over it and begin firing away at foes (use a shotgun for nearby enemies and automatic weaponry for those far away). Then, as you work your way towards the left, use the various cars as cover, being sure to dodge enemy bullets as you keep the heat on.

It's a good idea to aim a machinegun up at the roof of the garage and begin thinning out the enemies there. That's because, using a ladder on the building itself, you'll need to head up there, and preemptively clearing the enemy ranks before your climb will make surviving your brief stay on the roof a lot easier. After clearing what enemies you can (kill at least three foes before your climb), you can then climb up and begin exterminating any remaining foes. The baddies up here have better cover to utilize, so take things slowly and target one foe at a time to make the situation easier for you.

Now, when all of the red dots but one have disappeared from your HUD, that means that it's time to go after your mark. You'll notice that the red icon has a black line on it, however, indicating that the foe is either above or below you. To get to him on the higher-up roof adjacent to the building, you'll need to head to the far right of the initial roof and boost yourself up onto some metal crates. Use these crates to climb and jump up to the roof where the foe is located. Then, do him in with a firearm of your choice. Case closed.