Great Deal is the 13th mission in Mafia: The City of Lost Heaven.
Background
After the success of the last mission Don Salieri gives Paulie a chance to speak up about an idea. Paulie has heard that a man has some of the finest whiskey in Kentucky and is willing to sell it to Salieri. Salieri thinks this will make up for the mishap that took place a while ago.
Walkthrough
Meet Bill
Almost immediately after the cutscene is over you are outside the Grade Level Parking Lot. Speak to the guy in the booth near the entrance. He will tell you Bill and his men are on the top floor. You can either go to the stairs on your right or go up all the ramps to the top floor. When you get to the top you'll see a group of men with a small truck, that's Bill and his crew. Meet up with them and a cutscene will start.
Gunfight
The Morello gunmen
After you kill all the guys on this top level of the parking lot, take the ramp down to the next level, and take out the three guys down here.
There's a car parked straight ahead of you close to the ramp down, and there might be a guy with a Sawed-off Shotgun lurking behind it. He seems to randomly spawn. Anyway, go behind the car and you should see a box at your feet. Those are grenades. Pick all of them up and take out the rest of the guys on the next level down. When you reach the ramp on this level, you'll see it's blocked off by cars. They're going to throw some cocktails at you, so make sure Paulie and Sam, and you for that matter, are nowhere near them.
Throw a grenade or two at the cars that are blocking your way and run away so the blast doesn't hurt you. There should still be a few guys lurking down here. Take them out then use the first-aid kit. Head downstairs and a small cinematic will play. After it's over, head back upstairs and grab the truck. Drive down all the way to the exit.
Drive to the warehouse
It's recommended to take the Hoboken exit. Once you cross the Giuliano Bridge, keep going straight down the road through the rails blocking off this alley, then take the alley after this and you'll be close to the warehouse.
Result
After you have dropped off the truck at the warehouse, a small cutscene will play. Don Salieri reveals something. Bill was never from Kentucky, he was a small time hood who stole the whiskey from Morello. After that Intermezzo Three plays flashing back to 1938 with Tommy talking to Detective Norman.
Trivia
- This is the only mission involving more than 4 people in a car, but it's only a cutscene.
- Tommy, Paulie, and Sam aren't wearing any trench coats when leaving Salieri's Bar, but when they arrive at the parking lot they are.
- Coincidentally or on purpose, the seller's name is Bill Gates, the same as the Microsoft company founder.