Buy the following for easier kills:-

1)Directly upgrade your snub nose to the Saturday night Special.

2)Upgrade your pistol to Extended Clip Pistol(level 2)

3)Magnum to lvl2

4)shotgun to Double Barrel Shotgun(lvl 2)

5)Tommy Gun to lvl 2

Pause game, after press Circle, X, Triangle, Left, Right, Circle, Right.

Just another tedious farming method. If you happen to find a racket truck outside your
safe house(s), start a ruckus by shooting it so the truck's back door opens. Whack the
goons, take the money left over, and interrogate the driver. Head back to your safe house
and save the game. Heading back outside afterwards, another racket truck might
spawn/appear allowing you to repeat the process.

Pause game, after press Circle, Square, Circle, Square, Square, L3.

A good way to take over a compound is to kill everyone from afar then work your way in.
The enemies will not respawn as long as you do not leave the area (about one city block).
Just hide behind things by crouching, then shoot around corners to get kills. It is also
recommended that you upgrade at least two of the pistols (preferably the pistol or sawn
off magnum, for quicker shooting).

To take over a compound, equip all of your guns with ammunition, or use a powerful gun to
kill other gangsters and take their gun. You should have cover at all times. Note: When
behind the bushes to the left of the entrance they can shoot you through the bushes. Once
inside, do the same thing and always have cover. Then, run downstairs. In the back house
there are two men. One is behind a box and there is another behind a pillar. After those
two are dead, set the time bomb (not dynamite). If needed, stay in the basement and die,
then drive back and repeat on the other house.

When you are ready to take over a compound, the Tattaglias in northeast Brooklyn is
recommended because they may be the weakest family in New York, but that does not mean
they are going to be very simple to defeat either. Bring some bombs along and blow up the
support pillars in the basements. You may start a mob war, but if you are successful you
will have a new safe house with a group of guards.

When trying to take over a compound, use your car to run people over. Then, get out and
use it as a shield. Once you are in the yard, kill any enemies. Then if you have a lot of
ammunition, take one step into the house and shoot at the floor or person. The enemies
should step out as you hide. Shoot them, then continue into the room with the couches.
Someone could be hiding behind the couch. Run to the basement and clear it, then plant a
bomb. Do the same in the other house.

Unlock Python:

Buy 3rd Magnum upgrade

Unlock Street Sweeper:

Buy 3rd upgrade for Shotgun 

Unlock Saturday Night Special:

Buy 3rd .38 Snub Nose upgrade

Unlock Assassin's Pistol:

Buy 3rd Pistol upgrade

Unlock Dillinger:

Buy 3rd upgrade for Tommy Gun

If you are having trouble extorting business owners, try destroying some of their property
and/or hold a gun to their face. For example, when you are trying to take over Good Eats
in Brooklyn, you can hold a gun to the man's face then reholster the gun and extort. If he
refuses, simply draw your gun again, lock on, and hold it. Keep doing this until he caves
in. Do not forget to reholster your gun to avoid accidentally shooting him. In another
example, when you are trying to extort money from the hotel owner in Brooklyn, hold a gun
to him twice, break the downstairs cupboard, then finally blow his safe before you beat
him into submission. Always buy available rackets first. Take a trip around to either buy
another racket or go around the block. Do not attack until you visit again, and instead of
enemy soldiers you will find all your soldiers. By doing this you do not have to fight a
bunch of enemies and get your vendetta up.

If you have not taken over all the businesses and rackets, wait until you have reached the
Don Of New York City rank. You will be able to take over anything without having to smash
anything up or convince the person that it is a good idea; they will just say Yes
immediately.

Before going on a warehouse assault have these items: pistol (full ammunition), Tommy gun
(full ammunition), shotgun (full ammunition), magnum (full ammunition), molotovs (6), and
about $25,000. When going to a warehouse, try to blow up the roadblocks. After that, stand
there and shoot at oncoming gangsters with your pistol (headshots are essential). Then, go
in to the warehouse area. Stand behind boxes and shoot the enemies with the pistol or
magnum (again with headshots). Once you enter the warehouse, have either your shotgun or
Tommy gun ready. Most enemies will have shotguns and Tommy guns. When you kill them,
search for the owner. He will have puppeteer hands. Buy him out. Do not hit or injure him
or you will not be able to buy him out and will have to use pressure. More than likely you
will have also started a mob war. Do not bother looking for bombing business. Instead,
check the map for the nearest FBI agent and bribe him. You may lose $3,000, but it is less
risky. You will now have a warehouse and won a mob war at the same time.

If you need ammo for upgraded weapons and you do not have enough money,the best thing to
do is buy the predeccessor's ammo.Eg:-for Saturday Night Special, buy .38 snub nose ammo.

Complete the indicated mission or collect the indicated number of film reels to unlock the
corresponding movie:

Regarding Sollozzo: The Alley mission 

Mr. Bonasera: The Enforcer mission 

Meeting With Sollozzo: A Grave Situation mission 

Sicilian Sign: Sleeping With The Fishes mission 

Five Shots: The Don Is Dead mission 

Sonny And Tom Disagree: Intensive Care mission 

Sonny And Tom Argue Again: Fireworks mission 

Mr. Woltz: Death To The Traitor  mission 

Trigger Too Tight: Horseplay mission 

Mattresses Montage: A Recipe For Revenge mission 

Where's Michael?: Now it's Personal mission 

Spoiled Guinea Brat: The Silent Witness mission 

Carlo Learns A Lesson: Sonny's War mission 

Are You Ready To Do Me This Favor?: Change Of Plans mission 

The Don's Demise: Order To Kill mission 

Carlo Goes For A Ride: It's Only Business mission 

The Baptism: Baptism By Fire mission 

Johnny Fontane: Collect 10 film reels 

Don Sends Luca On An Errand: Collect 20 film reels 

Luca's Demise: Collect 30 film reels 

The Don Is Dead: Collect 40 film reels 

Whack Paulie: Collect 55 film reels 

Good Morning Mr. Woltz: Collect 70 film reels 

Sonny At The Tollbooth: Collect 85 film reels 

Sorry Sally: Collect 100 film reels

Before starting this mission, break the windows in the barber shop. This will allow for
easy shooting once the Don is shot. The recommended gun for this and any other close range
shooting mission is the magnum.

In missions where you have to kill an important figure in a certain way (such as pushing
them off a roof or into a furnace), you can do this easier by luring the enemy over to the
hazard you must use to kill them before fighting with them. Just avoid them and run over
to the hazard. They will come over to you. Beat them up a little, but do not kill them
completely. Then, grab them by holding L1 + R1, and swing them so they have their back to
the hazard. Then, push forward with the Analog-sticks to shove them to their death.

After the mission when Luca Brasi is killed ,go to the Corleone compound. Go inside the
building next to the gate.There you will meet one of the don's enforcers named Tessio.He
will ask you to do some work.Say yes and you will have to take down a guy.Don't go right
away.Roam around the house.You will find Tom Hagen, another person of the Don.He will say
something and then it will say you have been promoted to enforcer.

Reach the Underboss rank to have no heat when stealing a parked car.

Pause the game and enter CIRCLE SQUARE CIRCLE SQUARE SQUARE L3.

Pause the game and enter CIRCLE, SQUARE, CIRCLE, SQUARE, SQUARE, L3

Play the mission when you go to the hospital to protect the Don. After you kill the first
assassin and Michael Corleone tells you to go to the basement, go foward and make a left.
You should see a door with Michael Corleone talking to Vito Corleone while he is in the
hospital bed. Listen to the conversation carefully. This is the real Marlon Brando
talking, recorded while he was hospitalized.