Not that GTA IV needed a great ad to be successful, but this 60-second TV spot is really enticing. Protagonist and recent American emigrant Niko Bellic strolls through Liberty City like he already owns the place and steals a car (even though he clearly isn't in a hurry) while the scenery around him changes. The camera finally pans up to show the city skyline, and the drool starts to drip down onto our keyboards.