L.A. Noire Cheats - Xbox 360

Achievements
Complete each achievement to get the allotted gamerscore:

A Cop On Every Corner (15) - Complete a single street crime case.
Asphalt Jungle (15) - Chase down and tackle a fleeing suspect on foot as an LAPD Detective.
Auto Collector (15) - Drive 40 different vehicles.
Auto Enthusiast (15) - Drive 5 different vehicles.
Auto Fanatic (30) - Drive every vehicle in the city.
Dead Men Are Heavier (15) - Shoot and kill a total of 100 bad guys.
Golden Boy (15) - Clear a case finding every clue as an LAPD Detective or Investigator.
Hollywoodland (30) - Find and inspect all gold film reels.
One For The File (15) - Find and inspect a clue as an LAPD Detective or Investigator.
Paved With Good Intentions (15) - Complete all cases on the Traffic desk.
Police Academy (15) - Complete all cases on the Patrol desk.
Public Menace (30) - Rack up $47,000 in penalties during a single story case.
Roscoe And Friends (15) - Kill at least one bad guy with every gun.
Huckster (15) - At Elysian Fields, outwit Leland Monroe when discussing his developments or advertising campaign.
Johnny On The Spot (30) - Respond to 20 street crime cases.
Keep A Lid On (15) - Complete a brawl without losing your hat as an LAPD Detective or Investigator.
Lead Foot (15) - Keep the needle above 80mph for more than ten seconds while driving.
Magpie (80) - Find and inspect 95% of all clues.
Miles On The Clock (15) - Drive more than 194.7 miles.
Moth To A Flame (70) - Complete all cases on the Arson desk.
No Rest For The Wicked (15) - Complete all cases on the Vice desk.
Not So Hasty (15) - Stop a fleeing suspect with a warning shot as an LAPD Detective.
Star Map (15) - Discover all landmark locations around the city.
The Brass (30) - Achieve maximum rank.
Round Heels (15) - At the Bamba Club, get Dick McColl to give up the license plate of Celine Henry's male companion.
Shamus To The Stars (80) - Complete all story cases with a five star rating.
Stab-Rite (15) - At Ray's Cafe, find the bloodstained knife on your first sweep of the crime scene.
The City Of The Angels (80) - Reach 100% Game Complete.
The Fighting Sixth (15) - At the Bus Shooting, talk Felix Alvarro into giving up the Marines involved in the Coolridge heist.
The Plot Thickens (15) - Find and solve an inspection puzzle.
The Shadow (15) - Tail a suspect without being spotted, in a single case.
The Simple Art of Murder (15) - Complete all cases on the Homicide desk.
The Hunch (30) - Use four intuition points in a single interview session, correctly branching each question.
The Long Arm Of The Law (30) - Complete all street crime cases.
The Moose (15) - Follow Candy Edwards without using cover or incognito, except when starting or picking up the tail.
The Straight Dope (15) - Use evidence to prove a lie as an LAPD Detective or Investigator.
The Third Degree (30) - Correctly branch every question in every interview in a single story case.
The Up And Up (30) - Complete a story case with a five star rating.
Traffic Stop (15) - Disable a suspect vehicle with help from your partner.
Wooden Overcoats (30) - Bring down a total of 30 bad guys with head shots.

Additionally, there are five A Slip of the Tongue DLC achievements:

Chop Shop (20) - During the Industrial Street raid, kill a goon by shooting the hanging engine block.
Femme Imbécile (20) - Correctly branch every question in the interview with Jean Archer.
Racing For Pinks (20) - Find and inspect all of the Marquee-printed pink slips.
Nowhere In A Hurry (20) - Catch and arrest Cliff Harrison before he is stopped by uniformed backup.
The Printer's Devil (20) - Complete 'A Slip of the Tongue'.

Additionally, there are five The Naked City DLC achievements:

Chauffeur Service (20) - Escort Heather Swanson to Arnett's apartment without damaging your vehicle.
A Good-Looking Corpse (20) - Find and inspect all of the narcotics in Julia Randall's apartment.
Eight Million Stories (20) - Complete 'The Naked City'.
Fakeloo (20) - Tail Henry Arnett from Hollywood Station to the pawnbroker and travel agent without being spotted.
Give My Regards (20) - Shoot every letter down from the tower at the Broadway Hotel.

Additionally, there are five Nicholson Electroplating Disaster DLC achievements:

Bulletproof Windshield (20) - Kill the drivers of two of the MP vehicles in the Hughes Aircraft gun battle before they pull up.
Out Of The Frying Pan (20) - Pursue Vernon Mapes from the burning house to Hughes Aircraft on your first attempt.
Skeletons In The Icebox (20) - Find and inspect all clues inside Okamoto's ransacked apartment.
The Big Unfriendly (20) - Complete 'Nicholson Electroplating'.
The Nose Knows (20) - Find and inspect the prop spinner at the Nicholson blast site.

Unlock Costumes
Beat Cop Uniform - Awarded for starting Beat Cop missions.
Button Man - Awarded from the Badge Pursuit Challenge.
Sunset Strip Outfit - Awarded after reaching rank 8.
Sword of Justice Outfit - Awarded after reaching rank 3.
Chicago Lightning Suit - Awarded for joining the Rockstar Social Club.
Golden Boy - Awarded for reaching the Traffic Desk.
Hawkshaw Outfit - Awarded after reaching rank 18.
The Outsider Outfit - Awarded after reaching rank 13.
The Broderick - Amazon Pre-Order bonus.
The Sharpshooter - Pre-Order bonus from Best Buy and Zavvi.
Button Man (The Badge Pursuit Challenge) - Complete the Badge Pursuit challenge.

Avoid Bad Choices
In many interviews you can get up, walk out of a house or building, and force the game to auto save. Return to the interview and start it. If you make bad choices, just go back to the system's home screen or reset the game. You should be returned to the auto save before the interview.

Booze Bottles are Not Clues
Do not waste your time on things like cigarette butts, booze bottles and other things. They are solely meant to throw you off as you investigate a crime scene.

Chase Scenes
When chasing a suspect on foot or in a vehicle, hold [Camera Focus] to keep an eye on your prey. This makes chase scenes much easier.

When you get near a suspect on foot, you can press [Tackle ] repeatedly to tackle the suspect.

In a car chase, pull up alongside a driver to have your partner fire at him. If he shoots a tire, the car will slow down, emitting sparks from one wheel. A faster way to take out a driver, however, is to slam into a rear wheel, spinning the car out of control. T-boning a suspect at an intersection is another good way to take him out.

Avoid Criticism While Driving
If you are tired of listening to your partner criticize your driving, simply leave him and do not give him a chance to get in the car as you take off. He will appear when you arrive at the destination.

Newspaper Locations
Search the indicated location to find the corresponding newspaper:

Upon Reflection - On the right wall of the alley at the first crime scene.
The Driver's Seat - On the dining table inside the Black's residence.
A Marriage Made In Heaven - On the bar inside Ray's Cafe.
The Fallen Idol - On the workbench in the storage area of Silver Screen props.
The Red Lipstick Murder - Near the front door of the Henry residence.
The White Shoe Slaying - In Stuart Ackerman's shack at the Hobo area.
The Black Caesar - On the desk in the Ramez Removal Warehouse.
The Set Up - On the training table in the stadium.
Manifest Destiny - Near the downed shooter at the alley of Haskell's Finest Men's.
A Walk in the Elysian Fields - Search near the right corner of the Morelli's house's lawn.
A Polite Invitation - On Leland's Monroe's desk when raiding his mansion.
A Different Kind of War - On the front counter.
A Different Kind of War - On Harlan Fontaine's desk at the crime scene.

Red Dead Redemption Reference
In the Silk Stock Murder, after you investigate the long blood trail leading onto the roof, examine the body and find all the clues. You will be returned to your car. Instead of leaving, turn around and investigate the alley behind you. You will find a trash can with a cowboy hat in it, which Red Dead Redemption players may recognize as belonging to one John Marston.