Complete each achievement to get the allotted gamerscore. The numbers between the () is the points given for each achievement.
| Achievement | How to unlock |
|---|
| Asphalt Jungle (15) | Chase down and tackle a fleeing suspect on foot as an LAPD Detective. |
| Traffic Stop (15) | Disable a suspect vehicle with help from your partner. |
| Not So Hasty (15) | Stop a fleeing suspect with a warning shot as an LAPD Detective. |
| Shamus To The Stars (80) | Complete all story cases with a five star rating. |
| The Brass (30) | Achieve maximum rank. |
| The Plot Thickens (15) | Find and solve an inspection puzzle. |
| Golden Boy (15) | Clear a case finding every clue as an LAPD Detective or Investigator. |
| The Straight Dope (15) | Use evidence to prove a lie as an LAPD Detective or Investigator. |
| One For The File (15) | Find and inspect a clue as an LAPD Detective or Investigator. |
| The City Of The Angels (80) | Reach 100% Game Complete. |
| The Up And Up (30) | Complete a story case with a five star rating. |
| The Long Arm Of The Law (30) | Complete all street crime cases. |
| A Cop On Every Corner (15) | Complete a single street crime case. |
| Johnny On The Spot (30) | Respond to 20 street crime cases. |
| Public Menace (30) | Rack up $47,000 in penalties during a single story case. |
| The Moose (15) | Follow Candy Edwards without using cover or incognito, except when starting or picking up the tail. |
| Star Map (15) | Discover all landmark locations around the city. |
| The Third Degree (30) | Correctly branch every question in every interview in a single story case. |
| The Hunch (30) | Use four intuition points in a single interview session, correctly branching each question. |
| Auto Fanatic (30) | Drive every vehicle in the city. |
| Hollywoodland (30) | Find and inspect all gold film reels. |
| Auto Collector (15) | Drive 40 different vehicles. |
| Keep A Lid On (15) | Complete a brawl without losing your hat as an LAPD Detective or Investigator. |
| Auto Enthusiast (15) | Drive 5 different vehicles. |
| Lead Foot (15) | Keep the needle above 80mph for more than ten seconds while driving. |
| Miles On The Clock (15) | Drive more than 194.7 miles. |
| Magpie (80) | Find and inspect 95% of all clues. |
| The Shadow (15) | Tail a suspect without being spotted, in a single case. |
| Roscoe And Friends (15) | Kill at least one bad guy with every gun. |
| Wooden Overcoats (30) | Bring down a total of 30 bad guys with head shots. |
| Dead Men Are Heavier (15) | Shoot and kill a total of 100 bad guys. |
| Secret Achievements | - |
| Stab-Rite (15) | At Ray's Cafe, find the bloodstained knife on your first sweep of the crime scene. |
| No Rest For The Wicked (15) | Complete all cases on the Vice desk. |
| Moth To A Flame (70) | Complete all cases on the Arson desk. |
| The Simple Art of Murder (15) | Complete all cases on the Homicide desk. |
| Police Academy (15) | Complete all cases on the Patrol desk. |
| Paved With Good Intentions (15) | Complete all cases on the Traffic desk. |
| Huckster (15) | At Elysian Fields, outwit Leland Monroe when discussing his developments or advertising campaign. |
| Round Heels (15) | At the Bamba Club, get Dick McColl to give up the license plate of Celine Henry's male companion. |
| The Fighting Sixth (15) | At the Bus Shooting, talk Felix Alvarro into giving up the Marines involved in the Coolridge heist. |
| DLC Achievements | A Slip of the Tongue |
| The Printer's Devil (20) | Complete 'A Slip of the Tongue'. |
| Racing For Pinks (20) | Find and inspect all of the Marquee-printed pink slips. |
| Femme Imbécile (20) | Correctly branch every question in the interview with Jean Archer. |
| Chop Shop (20) | During the Industrial Street raid, kill a goon by shooting the hanging engine block. |
| Nowhere In A Hurry (20) | Catch and arrest Cliff Harrison before he is stopped by uniformed backup. |
| DLC Achievements | The Naked City |
| Eight Million Stories (20) | Complete 'The Naked City'. |
| A Good-Looking Corpse (20) | Find and inspect all of the narcotics in Julia Randall's apartment. |
| Fakeloo (20) | Tail Henry Arnett from Hollywood Station to the pawnbroker and travel agent without being spotted. |
| Chauffeur Service (20) | Escort Heather Swanson to Arnett's apartment without damaging your vehicle. |
| Give My Regards (20) | Shoot every letter down from the tower at the Broadway Hotel. |
| DLC Achievements | Nicholson Electroplatings |
| The Big Unfriendly (20) | Complete 'Nicholson Electroplating'. |
| 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 Nose Knows (20) | Find and inspect the prop spinner at the Nicholson blast site. |
| DLC Achievements | Reefer Madness |
| Every Herb Bearing Seed (20) | Complete 'Reefer Madness'. |
| High Flyer (20) | Find the flyer at Juan Garcia Cruz's house and proceed straight to the 20th Century Market. |
| Forcible Rear Entry (20) | Enter the Las Palmas stash house via the back door and kill Juan Garcia Cruz. |
| Soup In The Pot (20) | Open both soup cans in Juan Garcia Cruz's stash room. |
| Spare A Dime (20) | Complete the puzzle of the US Morgan silver dollars at Parnell's Soup. |
