Grand Theft Auto IV/Gambettis

This page contains spoilers for finishing missions.

Entourage:
Full armor/health would be nice, but a health pack is easily available if you need it. Bring plenty of ammo and some grenades.

When the action finally starts, you are in an alley. The guy you are protecting stays hidden and is not a factor.

Your most immediate threat is in the alley across the street, so crouch and take them out first. Then move to the right wall and take out any Bad Guys (BGs) to your left, then making sure you are in the Cover mode, switch to grenades and take out the guy behind the phone booth. More will come from that direction, so prepare to toss a few more.

When all the street-level BGs are taken care of, you will still se a couple of red circles with arrows indicating they are above you (on the roof of the building on the right, which is just one story.

Using your automatic weapon, you can inch out looking up and see part of one BG and be able to take him out, then keep backing out into the street while free-aiming at the middle of the roof until the other BG shows himself and take him out.

Your guy should come out. Both of you get in the car and after you turn onto the street, several cars of BGs will come after you, but only one can keep up with you, sometimes scooting past you to shoot at you.

Don't waste effort trying to shoot back. Instead, focus on flooring it on the many long straight streets, avoiding crashes, scooting between lines of cars, and eventually you will lose them.