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I wanna lay my cards on the table. I don't give two fucks about who your family is or how many ninjas you got up your sleeve. Am I making myself clear?
~ Avery Duggan to Tao Cheng.

Avery Duggan is a major antagonist in Grand Theft Auto Online, serving as the main antagonist of The Diamond Casino & Resort update and the posthumous overarching antagonist of The Diamond Casino Heist update. He is a Texan petrochemical magnate.

It is unknown who voiced Avery Duggan, as the voice actor is never credited or mentioned.



Avery comes from a corrupt family of Texas petrochemical magnates who want to buy The Diamond Casino & Resort, but first wants to destroy it, because it will significantly reduce the value of the property and allow him to buy everything at the lowest prices.

He is a wealthy businessman who helped the casino owners pay off their debt during construction because they fought financially.

He has a nephew, Thornton Duggan, who seems to be his immediate successor to a family business. They both try to get along, because Thornton is often terrified by his uncle's uncompromising scale.

In 2019, Avery Duggan and his colleagues began to trouble the newly opened Diamond Casino & Resort in Los Santos, seeking a hostile takeover of the company. The new casino manager, Agatha Baker, as well as the casino owner, Tao Cheng thwart his attempts to force them into bankruptcy.

Events of The Diamond Casino & Resort

In 2019, Avery Duggan and his associates began causing trouble for the newly opened Diamond Casino & Resort in Los Santos, seeking a hostile takeover of the business. The protagonist is contacted by both the casino's new manager, Agatha Baker, and the casino's owner, Tao Cheng, for help in attempting to make peace with Avery and thwart his attempts to force them into bankruptcy.

In the mission Casino - House Keeping, Avery pays several thugs to assault casino patrons and vandalize casino property, which in turn hurts business. The Diamond's Head of Security, Vincent, asks the protagonist to help put a stop to this, and after doing so, they earn a ton of gratitude from Ms. Baker.

In the mission Casino - Strong Arm Tactics, Tao agrees to meet with Avery and his nephew Thornton, but is so high on drugs when he gets there that the talks quickly go sour. Having lost his patience, Avery orders his henchmen to kill Tao, the protagonist, and Tao Cheng's Translator, but the three escape and make a getaway to the Pacific Bluffs Country Club to plan their next move.

Tao, now furious, decides to hire the protagonist to foil Avery's plans by any means necessary. In the mission Casino - Play to Win, the protagonist destroys most of Avery's assets in the oil and gas industries. This prompts him to retaliate in the mission Casino - Bad Beat, when his henchmen show up to the casino armed to the teeth and with attack helicopters. Thornton Duggan falls out with his uncle at this point and arrives at the casino shortly before Avery's mercenaries to warn everyone of the impending attack. After a grisly struggle, the attack is repelled by the protagonist.

The bad news doesn't stop there. Tao's uncle in Hong Kong contacts Ms. Baker and tells her to sell the casino immediately because there has been too much "drama" surrounding it. Because Tao's uncle provided most of the funding to renovate the casino, neither Ms. Baker nor Tao can refuse him. As everyone is preparing to move their belongings and search for new jobs, Thornton suddenly shows up again with an offer. He proposes to save the casino by buying it out at full price from the Cheng family which will result in a transfer of ownership. However, there is a catch. Thornton admits he won't have that kind of money to spend unless somebody kills his uncle, which will result in Thornton receiving his full inheritance. Avery has rented the La Fuente Blanca ranch just outside the city limits and that's where he's currently holed up.

In the last mission Casino - Cashing out, as everyone is preparing to move their belongings and search for new jobs, Thornton suddenly shows up again with an offer. He proposes to save the casino by buying it out at full price from the Cheng family which will result in a transfer of ownership. However, there is a bit of a problem. Thornton admits he won't have that amount of money to spend unless somebody kills his uncle, which will result in Thornton receiving his full inheritance. Avery has rented the La Fuente Blanca ranch just outside the city limits and that's where he's currently holed up. Tao orders the protagonists to kill Avery once and for all. The protagonist seeks into his ranch, but he makes an escape with his evacuation helicopter alongside other protection helicopters. The protagonists succeeds to kill Avery and returns to the casino. At the end Thornton becomes the proud new owner of the casino. He wants the casino to remain the way it is (expect for firing Vincent, the head security). He then says that he is expecting twice the profit the casino is already making.


  • It's possible that Avery Duggan is based on Avery Carrington, a real estate tycoon who appeared in the Grand Theft Auto games set in the 3D Universe, which preceded the current HD Universe (in which Grand Theft Auto Online is set). Both of them share the same first name and birthplace, they are succesful businessmen who resort to act illegally to achieve their goals and both ended up getting killed by a protagonist (Toni Cipriani and the GTA Online Protagonists) under the orders of their protegés (Donald Love and Thornton Duggan). The main difference being Avery Carrington never being the main antagonist whereas Avery Duggan is one.
  • Despite being the third major antagonist introduced in Grand Theft Auto Online, Avery Duggan is much less evil and weaker than Avon Hertz and Cliffford, the main and secondary antagonists of The Doomsday Heist DLC respectively. In addition, Avery only wanted to destroy the Casino and rebuild it in his own image whereas Avon was bent on wiping out all of mankind by inciting a nuclear war, with Clifford going a step further and trying to be worshipped as a god by lesser AI's.



Grand Theft Auto
The Police | Robert "Bubby" Seragliano | Uncle Fu | El Burro | Samuel Deever | Brother Marcus | Dumb Kurt | Chu Ying | No Chin | Wun Tun Chun | Bryson

Grand Theft Auto London
Harold Cartwright | Jack Parkinson | Albert & Archie Crisp

Grand Theft Auto 2
Claude Speed | Billy Bob Bean | Dr. LaBrat | Jerkov | Sunbeam | Hiroshi| Refried Noodle | Johnny Zoo | Red Valdez | Trey Welsh | Elmo | Uno Carb | Chesti-Kov | Yonsi Zoo San | Johnny Rotten | Tetsuo

Grand Theft Auto III
Claude | Catalina | Salvatore Leone | Miguel | Donald Love | Ray Machowski | Leon McAffrey | Asuka Kasen | King Courtney | Toni Cipriani | Marty Chonks | Phil Cassidy | Lee Chong | Curly Bob | Mike Forreli

Grand Theft Auto: Vice City
Tommy Vercetti | Sonny Forelli | Lance Vance | Ricardo Diaz | Phil Cassidy | Auntie Poulet | Umberto Robina | Juan Cortez | Alex Shrub | Jack Howitzer | Avery Carrington | Gonzalez | Leo Teal | The Psycho | Hilary King | Cam Jones | Donald Love | Victor Vance | Mr. Black

Grand Theft Auto: San Andreas
Carl Johnson | Sweet Johnson | Cesar Vialpando | Frank Tenpenny | Richard Burns | Big Smoke | Ryder | Eddie Pulaski | Jizzy B. | T-Bone Mendez | Catalina | OG Loc | Johnny Sindacco | Salvatore Leone | B Dup | Claude | Snakehead | Berkley | Tommy Vercetti

Grand Theft Auto Advance
Mike | Vinnie | Colombian Cartel Lieutenant | King Courtney | Asuka Kasen

Grand Theft Auto: Liberty City Stories
Toni Cipriani | Massimo Torini | Paulie Sindacco | Vincenzo Cilli | Salvatore Leone | Leon McAffrey | Donald Love | JD O'Toole | Ned Burner | Phil Cassidy | Kazuki Kasen | Jane Hopper | Cedric Fotheringay

Grand Theft Auto: Vice City Stories
Victor Vance | Jerry Martinez | Diego & Armando Mendez | Marty Jay Williams | Lance Vance | Ricardo Diaz | Phil Cassidy | Bryan Forbes | Marty Williams' cousin | Trailer Park Mafia

Grand Theft Auto IV
Niko Bellic | Dimitri Rascalov | Jimmy Pegorino | Darko Brevic | Vlad Glebov | Ray Bulgarin | Brucie Kibbutz | Karen Daniels | Manny Escuela | Tom Rivas | Mikhail Faustin | Ray Boccino | Little Jacob | Elizabeta Torres | Packie McReary | Derrick McReary | Francis McReary | Gerald McReary | Playboy X | Dwayne Forge | Johnny Klebitz | Luis Lopez | Roman's Kidnapper | Clarence Little | Dardan Petrela | Judge Grady | Jim Fitzgerald | Johnny Barbosa | Phil Bell | Joseph DiLeo | Luca Silvestri | The Cook | Teddy Benavidez | Eddie Low | The Fixer | Jon Gravelli | Wedding Assassin | Trunchez Brothers | Jeff Harlingford | Adam Dimayev | Eduard Borodin | Isaac Roth | Mori Green | United Liberty Paper Contact | Aiden O'Malley

Grand Theft Auto IV: The Lost and Damned
Johnny Klebitz | Billy Grey | Ray Boccino | Brian Jeremy | Jim Fitzgerald | Terry Thorpe | Clay Simons | James "Jimmy" Matthews | Ed McCornish | Thomas Stubbs | Niko Bellic | Luis Lopez | Dimitri Rascalov | Roman's Kidnapper | Ray's Goon | Lester Arnold

Grand Theft Auto IV: The Ballad of Gay Tony
Luis Lopez | Ray Bulgarin | Rocco Pelosi | Timur | Vince Pelosi | Yusuf Amir | Niko Bellic | Johnny Klebitz | Vic Manzano | Margot | Marki Ashvilli | Billy Grey | Dimitri Rascalov | Ahmed Khaleel

Grand Theft Auto: Chinatown Wars
Huang Lee | Wu Lee | Zhou Ming | Chan Jaoming | Rudy D'Avanzo | Hsin Jaoming | Mini Gun Wonsu Assassin | Lester Arnold

Grand Theft Auto V
Michael De Santa | Trevor Philips | Franklin Clinton | Devin Weston | Steve Haines | Wei Cheng | Stretch | Molly Schultz | Don Percival | Lester Crest | Lamar Davis | Nigel | Mrs. Thornhill | Ursula | Alonzo | Derrick | Dave Norton | Brad Snider | Martin Madrazo | Jimmy De Santa | Simeon Yetarian | Andreas Sanchez | Cris Formage | Rocco Pelosi | Peter Dreyfuss | Clay Simons | Terry Thorpe | D | Patrick McReary | Johnny Klebitz | Tao Cheng | Chef | Christian Feltz | Daryl Johns | Eddie Toh | Gustavo Mota | Hugh Welsh | Karim Detz | Karl Abolaji | Norm Richards | Paige Harris | Patrick McReary | Rickie Lukens | Taliana Martinez | Paige Harris | Elwood O'Neil | Beverly Felton | Joe | Josef | Lost Fugitive | Abigail Mathers | Josh Bernstein | Ortega | Enzo Bonelli | Billy Grey | Curtis Weaver | Glenn Scoville | Larry Tupper | Ralph Ostrowski | United Liberty Paper Contact | Gianni | Tracker | Jock Cranley

Grand Theft Auto Online
Main Game
GTA Online Protagonists | Lester Crest | Trevor Philips | Cris Formage
The Doomsday Heist
Avon Hertz | Cliffford | United Liberty Paper Contact
The Diamond Casino & Resort
Thornton Duggan | Avery Duggan
The Diamond Casino Heist
Thornton Duggan
Los Santos Summer Special
The Boss
The Cayo Perico Heist
Juan Strickler

Gangs and Cartels
Angels of Death Motorcycle Club | Ballas | Cholos | Colombian Cartel | Da Nang Boys | Diaz's Gang | Grove Street Families | Hare Krishna | Loonies | Los Santos Vagos | The Lost MC | Madrazo Cartel | Marabunta Grande | O'Neil Brothers | Rednecks | San Fierro Rifa | Seville Boulevard Families | Southside Hoods | Street Sharks | Varrios Los Aztecas | Trailer Park Mafia | Trevor Philips Enterprises
Armenian Mob | Bulgarin Family | Duggan Crime Family | Faustin-Rascalov Family | Forelli Family | Pegorino Family | Trunchez Brothers | Kkangpae | Leone Family | Russian Mafia | Sicilian Mafia
Liberty City Triads | Los Santos Triads
The Law
Police | C.R.A.S.H. | Los Santos Police Department | Federal Investigation Bureau | International Affairs Agency
Altruist Cult | Epsilon Program
Cliffford Mercenaries | Crack Dealers | Liquor Store Bandits | Loco Syndicate | Merryweather Security | SRS | Survivalists | The Professionals | Zaibatsu Corporation | Zombotech Corporation