Grand Theft Auto IV Walkthrough

As Playboy X points out to you, there are three well-positioned snipers guarding the construction site that must be eliminated if you are to have any reasonable chance at killing the union leaders you will then go after. These guys can be a bit of a pain to find, to be honest, but a great way to spot them is to use your HUD. Try to line yourself up with the enemies you're seeking on the HUD, and then face their direction, using your scope to locate them. This is the best technique, simply because gazing through the scope wildly looking for the foes without knowing where to look is going to frustrate you beyond belief. Trust us.

When you locate one, pick him off. Remember to try to aim for the head or chest for a quick, instantaneous kill. You'll know when each foe is killed because a brief cutscene will show them falling to their death (or otherwise meeting their demise). You can also try to take out one or two other enemies below to thin the ranks before proceeding there yourself. When you've taken out all eligible enemies, descend with the same elevator you used to reach the roof in the first place. Then, equip that machinegun you now have in your arsenal and cross the street.

This upcoming part can be a little difficult, because not all of the enemies will show up as red dots on your HUD. Only the union leader you're targeting at the time will be shown. That means you really have to use your eyes and ears to watch and listen for anything going on around you. Try to take cover, take things slow, and keep a keen eye out for enemies as you proceed. There will be some innocent bystanders in the compound, but don't risk anything. Kill them as well, so no one is standing.

The first union leader is located straight ahead of the entrance into the construction site. Run forward, being sure to seek ample cover as his goons begin shooting on you. Remember -- the union leader himself will be represented as a red dot on the HUD, but you'll still need to nullify everyone in the area in order to safely proceed. Therefore, you might as well make the relatively-defenseless union leader for last and take out his much more heavily armed accomplices first.