Keep Car Dealership mission cars:
Note: do this in either Jimmy's Vendetta or The Betrayal of Jimmy. First, start the mission with the vehicle you would like to keep. Once you are inside the vehicle, get back out and get into another car (preferably the one you started the mission with). Get back out and into the target vehicle once more. At this point, complete the mission. At the scoring screen, select to REPLAY the mission (not continue). The replay should start with the target car as your vehicle. Drive it to a garage, store it, and then complete the mission again. Now you have the vehicle in your garage, and can use it as you like! This also allows you to acquire cars that are impossible to find elsewhere, such as the Culver Empire in the Betrayal of Jimmy and many 1940's-only cars in Jimmy's Vendetta, as well as the Prison Bus (although the bus can't be stored in a garage).
Easy money hints:
-Go to Bruski's Scrapyard and break into the random car located near the car crusher. Drive the car into the car crusher and crush it to get about $400. Enter the car you came in and drive it out of the scrap yard through the north exit. Stay on this road until you drive under a bridge. Then, turn around and return to the scrap yard. Another random car will have respawned near the car crusher. Repeat as desired. This will also unlock "Proper Scrapper" trophy.
-Go to a store and spend some money, then pull out a gun and rob the
store. You will get more money than you would by just robbing the store
Removing wanted level:
To remove your wanted level, go the nearest phone and make a call. It
will give you the option to bribe the police. Choose this choice to
remove your wanted level.
Avoid death near cars:
When you are hiding behind a car in a gun fight, stay away from the engine. If the engine part is facing the enemy, their gunfire may cause it to explode and kill you.
Gilbert Gottfried easter egg:
There is a shoe shiner in Chinatown that looks and sounds like Gilbert Gottfried.
Jimi Hendrix easter egg:
You will earn a trophy named "Hey Joe" when you crush the car that has the bartender's body in it after Joe killed him. In the Jimi Hendrix song "Hey Joe", the lyrics include the line "Hey Joe, where you going with that gun in your hand."
Zero Wing easter egg:
When you go to prison and to the yard, there will be a crazy man in the center. He says phrases such as "All your base are belong to us", "Someone set us up the bomb", and "You have no chance to survive make you time", from Zero Wing. If you talk to him, he will run away.
Playboy Centerfold locations:
Find the following Playboy Centerfolds by playing the corresponding Chapters and searching the indicated locations:
CENTERFOLD - CHAPTER - LOCATION
Playmate 1 - Chapter 2 "Follow Joe to his Garage" - On Joe's coffee table
Playmate 3 - Chapter 2 "Car Crusher" - On shelf in three-car garage
Playmate 18 - Chapter 3 "The Southport Docks" - On floor outside Derek's office
Playmate 4 - Chapter 3 "Drive to Maria Angello's" - On the floor of Maria's apartment behind the door
Playmate 5 - Chapter 3 "Get Inside the Office" - In the Industrial Specialists Office on the windowsill
Playmate 40 - Chapter 3 "Get Inside the Office" - On the first floor security guard desk
Playmate 6 - Chapter 3 "Get Inside the Office" - On the floor of the basement stoarage room
Playmate 9 - Chapter 4 "Get Out of the Mall" - In a box on the first stairwell landing
Playmate 2 - Chapter 4 "Get Out of the Mall" - By locked doors in the second stairwell after the bookstore
Playmate 8 - Chapter 4 "Fend off the Cops" - On floor of the rooftop structure
Playmate 7 - Chapter 4 "Go to Sleep" - At the bottom of the stairs (don't go into the apartment)
Playmate 11 - Chapter 5 "Kill the Fat Man" - Exit the apartment with Henry and Joe and take the stairs up
Playmate 10 - Chapter 5 "Kill the Fat Man" - Quickly get to the first floor distillery office, it's on a shelf
Playmate 12 - Chapter 5 "Kill the Fat Man" - On the 5th floor, look to the right as you escort Henry
Playmate 13 - Chapter 6 "Contact Leo Galante" - Under the sleeping prisoner
Playmate 14 - Chapter 6 "Contact Leo Galante" - Search behind the grey shack by the basketball court
Playmate 15 - Chapter 6 "Go to the Guard" - On top of the large drying machine
Playmate 16 - Chapter 7 "Playmate 16" - Catch Up with Joe - On the floor of the gun store near the stairs
Playmate 50 - Chapter 7 "Drive with Joe to Apartment" - At the end of the hall on the top floor
Playmate 17 - Chapter 7 "Drive with Joe to Apartment" - On the hallway table on the second floor
Playmate 46 - Chapter 7 "Drive with Joe to Apartment" - On the kitchen table in the apartment
Playmate 19 - Chapter 8 "Take Out the Greasers" - In a shack around the corner in the foundry
Playmate 21 - Chapter 8 "Take Out the Greasers" - On the ground near some oil drums
Playmate 20 - Chapter 8 "Take Out the Greasers" - Search the narrow alley to the left of the mob, it's in a shack
Playmate 41 - Chapter 9 "Head to Maltese Falcon" - Lying on the bar
Playmate 23 - Chapter 9 "Find Way into Slaughterhouse" - Search the tunnel to the left of the sewage dump
Playmate 22 - Chapter 9 "Slaughterhouse Interior" - On the floor in the first slaughterhouse area
Playmate 24 - Chapter 9 "Save Your Guys" - On a shelf in the back corner near the entrance
Playmate 25 - Chapter 10 "Find Cleaners Uniform" - On a desk in an office in the rear of a laundry area
Playmate 27 - Chapter 10 "Follow Joe to Roof" - On the floor downstairs -- don't follow Joe upstairs
Playmate 26 - Chapter 10 "Find Window Washing Platform" - On the floor by the elevator power source
Playmate 48 - Chapter 11 "Get the Door" - On the bathroom floor
Playmate 47 - Chapter 11 "Drive Leo to Train Station" - Search the second floor of the house, it's on a window sill in the hallway
Playmate 29 - Chapter 11 "Drive Leo to Train Station" - Search the second floor of the house, it's in the bathroom
Playmate 28 - Chapter 11 "Go Home" - On the bedroom floor
Playmate 49 - Chapter 11 "You Must Get Dressed" - On the floor by Joe's bed
Playmate 30 - Chapter 11 "Catch Irish Leader" - Under a box in the end of the hallway
Playmate 32 - Chapter 12 "Drive to Seagift Warehouse" - Between the delivery truck and the crates
Playmate 31 - Chapter 12 "Drive to Seagift Warehouse" - In an alley behind some dumpsters
Playmate 33 - Chapter 12 "Get Out of Here!" - Under the green power panel on the wall
Playmate 34 - Chapter 13 "Find Wong" - In the rear corner of the main dining area
Playmate 36 - Chapter 13 "Find Wong" - In the opium den, on a wooden crate
Playmate 35 - Chapter 13 "Find Wong, Basement" - In the basement of the armory on a box
Playmate 44 - Chapter 14 "Get Out of the Building with Joe" - Search the narrow area on the eastern edge of the building
Playmate 37 - Chapter 14 "Floor 3" - On a stack of burning pallets
Playmate 38 - Chapter 14 "Floor 3" - In the rear corner of the room with a single shooter
Playmate 45 - Chapter 15 "Observatory" - In the first floor stairwell
Playmate 39 - Chapter 15 "Observatory Roof" - Search the western edge of the roof
Playmate 43 - Chapter 15 "Observatory Interior" - Behind the telescope, staircase
Playmate 42 - Chapter 15 "Leave the Observatory" - At the base of the observatory projector
Viva la Resistenza! - Complete Chapter 1.
Home Sweet Home - Complete Chapter 2.
Back in Business - Do your first job for Mike Bruski.
Big Brother - Protect Francesca.
A Real Gentleman - Help the woman fix her car in Home Sweet Home.
The Price of Oil - Complete Chapter 3.
The Professional - Obtain the ration stamps without raising the alarm.
Mail Man - Sell all the gas stamps before the time runs out.
Night Shift - Complete Chapter 4.
Good Spirits - Complete Chapter 5.
Time Well Spent - Complete Chapter 6.
Last Respects - Complete Chapter 7.
The Wild Ones - Complete Chapter 8.
Man of Honor - Complete Chapter 9.
Checking Out - Complete Chapter 10.
Our Good Friend - Complete Chapter 11.
Wake Up Call - Help Leo out of a tricky situation without getting caught.
Chasing the Dragon - Complete Chapter 12.
Chop Chop! - Complete Chapter 13.
Get Rich or Die Flyin' - Get all wheels of your car into the air for at least 20 meters and then touch the ground again.
Pedal to the Metal - Travel at 125 mph.
One Careful Owner - Travel a total of 50 miles in one vehicle.
Proper Scapper - Sell 5 vehicles to Mike Bruski at the scrapyard.
Exporter - Sell 5 vehicles to Derek at the dock.
Cruise Control - Keep any vehicle at 30 mph or over for 5 or more minutes.
Hairdresser - Kill 5 enemies in rapid succession with a headshot.
Knucklehead - Kill a total of 30 enemies using melee attacks.
Stuck Up - Rob 5 stores in under 5 minutes.
The Enforcer - Kill 50 enemies.
Sharp Suiter - Buy your first luxury suit.
Tuned Ride - Upgrade one of your cars one level.
Dream Handling - Upgrade one of your cars to the maximum level.
Hard to Kill - The police want you dead. Survive for 10 minutes!
Collector's Item - Find at least one collectible in the game.
Petrol Head - Drive at least 30 different vehicles.
Met at Work - Complete Chapter 14.
Finish Him - Finish what you started.
Ladies' Man - Find all of the Playboy magazines.
Card Sharp - Find all of the Wanted posters.
He Who Pays the Barber - Improve the dockworker's haircuts.
A Lesson in Manners - Show that you know how to treat a lady.
Hey Joe - Clean up after Joe.
End of the Rainbow - Settle the score with the Irish once and for all.
The Mafia Never Forgets - Pay a visit to an old friend.
Out for Justice - Learn what it means to be a Scaletta.
Made Man - Finish the story on Medium difficulty or higher.
Tough Nut - Finish the story on Hard difficulty level.
Platinum Trophy - Earn all Bronze, Silver, and Gold trophies.
"Jimmy's Vendetta" Trophies:
First step - Complete your first mission in 'Jimmy's Vendetta.'
Faster than Light - Achieve a 10x point multiplier in 'Jimmy's Vendetta.'
Explorer - Drive a total of 1,000 miles in vehicles in 'Jimmy's Vendetta.'
Armament King - Kill your enemies in 'Jimmy's Vendetta' with every weapon available in the game.
Firebug - Destroy 100 vehicles in 'Jimmy's Vendetta.'
Sharpshooter - Kill 100 enemies by headshots in 'Jimmy's Vendetta.'
Carnapper - Finish all Car Dealer missions in 'Jimmy's Vendetta.'
Massacre - Kill 1,000 enemies in 'Jimmy's Vendetta.'
Revenged - Finish 'Jimmy's Vendetta' on any difficulty level.
Millionaire - Earn 1,000,000 points in 'Jimmy's Vendetta.
"Joe's Adventures" trophies:
Arctic Grave - Push the chief witness into the ice lake in 'Joe's Adventures.'
Dockyard Discord - Finish the Connection level in 'Joe's Adventures.'
Driftin' Daddy-O - Reach 200 points for one Drift in 'Joe's Adventures.'
Five Finger Discount - Finish the Supermarket level in 'Joe's Adventures.'
Hypersonic - Reach 2000 points for one velocity run in 'Joe's Adventures.'
Jack of all Trades - Reach 10 different score actions in one mission in 'Joe's Adventures.'
Jacked Jumper - Reach 200 points for one Jump in 'Joe's Adventures.'
What Witness? - Finish the Witness level in 'Joe's Adventures.'
Mind the Goods - Finish the Cathouse level in 'Joe's Adventures.'
Same Shirt Different Day - Finish Joe's Adventures on any difficulty.