Playable

A veteran of the Balkan wars who arrives in Liberty City on his cousin's promise of a mansion and finds a cab office and a debt. He stays because the man who sold out his unit is somewhere in the city.
All 90 missions · 2 as giver
GTA IV
36of 90
Mission 36 of 90Story mission
Tom Goldberg is a lawyer holding files Francis wants destroyed, and Francis's plan is to have Niko walk into a law firm in daylight under a fake appointment. The mission is a job interview that becomes a murder.
It needs a suit, and it is one of the few missions in the game with a clean way out of the building that avoids the police entirely.
Apply through the firm's careers page at any Tw@ terminal — the resume has to be submitted twice before the call comes back with a time.
A suit with a tie and decent shoes is required, from Perseus if Niko does not already own one. Buying it before starting saves the trip.
Follow the receptionist rather than moving ahead of her. The files come first and Goldberg second.
Fighting down the stairs works and brings the police with it. The quieter answer is to use a knife on Goldberg, break the window behind his desk with it and go through — that leaves the building without a wanted level at all, and the files can be taken straight to Francis.
Who this mission brings together, and the ground it covers.
Playable

A veteran of the Balkan wars who arrives in Liberty City on his cousin's promise of a mansion and finds a cab office and a debt. He stays because the man who sold out his unit is somewhere in the city.
All 90 missions · 2 as giver
Gives the job

A senior police officer who built a career on the family he pretends not to have, and hires Niko to keep it that way.
7 of 90 missions · 5 as giver