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
67of 90
Mission 67 of 90Story mission
Ray wants the Lost MC punished for the museum, and the pursuit starts on a stolen bike outside their hangout. It ends underground: the bikers ride down into the subway system and the chase continues along the platforms and the tracks.
Riding a motorcycle through a live subway tunnel is exactly as hazardous as it sounds, and it is the reason this mission is remembered.
Two of them leave on a Freeway. A drive-by is what takes a rider down, and getting at least one before the tunnel makes the underground half much shorter. Watch for the point near the bridge where they cut left onto the pedestrian path.
The map shows a shorter route to the tunnel entrance. Taking it and waiting there means shooting them as they drop onto the track rather than chasing them across Algonquin.
Trains run and they will kill Niko outright, so watch for headlights ahead. Turning the bike's lights on underground helps considerably.
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 Pegorino family capo whose diamond deal drags Niko, Johnny and half of Liberty City into the same disaster from three directions.
10 of 90 missions · 7 as giver