Random characters/GTA V

Abigail Mathers

 * Death at Sea (unlocked after the purchase of the Sonar Collections Dock and completing Blitz Play)
 * What Lies Beneath (unlocked after collecting all 30 submarine parts)

Barry

 * Grass Roots - Michael
 * Grass Roots - Trevor
 * Grass Roots - Franklin (required)
 * Grass Roots - The Pickup (required)
 * Grass Roots - The Drag (required)
 * Grass Roots - The Smoke-In (required)

Beverly Felton

 * Paparazzo (required)
 * Paparazzo - The Sex Tape (required)
 * Paparazzo - The Partnership (required)
 * Paparazzo - The Meltdown (required)
 * Paparazzo - The Highness (required)
 * Paparazzo - Reality Check (required)

Civil Border Patrol

 * The Civil Border Patrol
 * An American Welcome
 * Minute Man Blues

Cletus

 * Target Practice
 * Fair Game

Dom Beasley

 * Risk Assessment (required)
 * Liquidity Risk (required)
 * Targeted Risk (required)
 * Uncalculated Risk (required, unlocked after completing all Parachute Jumps)

Peter Dreyfuss

 * A Starlet in Vinewood (required, unlocked after collecting all 50 Letter Scraps)

Epsilon Program

 * Seeking the Truth
 * Accepting the Truth
 * Assuming the Truth
 * Chasing the Truth
 * Bearing the Truth
 * Delivering the Truth
 * Exercising the Truth
 * Unknowing the Truth

Hao

 * Shift Work (required)

Josh Bernstein

 * Extra Commission
 * Closing the Deal (unlocked after destroying all 15 Lenny Avery's For Sale signs)
 * Surreal Estate
 * Breach of Contract

Mary-Ann Quinn

 * Exercising Demons - Michael
 * Exercising Demons - Franklin (required)
 * Exercising Demons - Trevor

Maude

 * Special Bonds

Mrs. Philips

 * Mrs. Philips/Damaged Goods (unlocked after story completion only if options B or C were chosen)

Nigel

 * Vinewood Souvenirs
 * Vinewood Souvenirs - Willy
 * Vinewood Souvenirs - Tyler
 * Vinewood Souvenirs - Kerry
 * Vinewood Souvenirs - Mark
 * Vinewood Souvenirs - Al Di Napoli
 * Vinewood Souvenirs - The Last Act

Omega

 * Far Out (required)
 * The Final Frontier (required, unlocked after collecting all 50 Spaceship Parts)

Rampage

 * Rampage One
 * Rampage Two
 * Rampage Three
 * Rampage Four
 * Rampage Five

Sasquatch Hunter

 * The Last One (unlocked after achieving 100% Completion)

Tonya Wiggins

 * Pulling Favors (required)
 * Pulling Another Favor (required)
 * Pulling Favors Again (required)
 * Still Pulling Favors (required)
 * Pulling One Last Favor (required)

Cut Missions
Barry
 * Barry 3b (Grass Roots mission in between The Pickup and The Drag)
 * Franklin has to deliver a helicopter containing drugs to Barry. After Franklin flies the helicopter with drugs in it, he lands the helicopter on the roof of a building near Barry's apartment.

Dale
 * Dale 1
 * Franklin meets Dale outside a nightclub. Dale asks him to take photographs of ten hot women around the town and send them to him. This unlocks a "collectible" ambient task similar to Extra Commission.
 * Dale 2
 * After taking 10 photos of hot women, Franklin meets Dale in a club and discovers that Dale is planning on drugging the women in the photos Franklin took. Franklin tries to stop him but is drugged by Dale who then escapes. Franklin must chase and kill Dale.

Magenta
 * Magenta 1
 * Michael meets Magenta in the middle of nowhere, walking and chanting. She asks Michael to attain true perfection in body. Michael needs to attain perfection in body by purchasing and wearing high-end clothes to be welcomed by Magenta and to trigger the second mission at Magenta's house.
 * Magenta 2
 * Michael turns up at Magenta's house in his new high-end clothing. He rings the bell and is invited in to a group of elderly people having sex. Disturbed, he exits the building and phones his shrink, asking for more therapy.

Mrs. A and Mrs. B
 * Mrs. A and Mrs. B 1
 * Franklin helps Mrs. A get revenge on her neighbour by heading over to Mrs. B's house and wrecking her car. Franklin uses a melee weapon to physically damage the vehicle. Franklin then has to drive the car into the sea to finish it off.
 * Mrs. A and Mrs. B 2
 * Franklin feels sorry for Mrs. B and helps her get revenge on Mrs. A. Mrs. B tells him Mrs. A is proud of her garden so he decides to urinate into her pool. Her husband returns home and finds Franklin at it and he calls the cops.
 * Mrs. A and Mrs. B 3
 * Franklin finds Mrs. A crying on the sidewalk. They decide to drive around the neighbourhood, spreading rumours about Mrs. B. Franklin takes the wheel while Mrs. A yells bogus announcements through a megaphone. They then return to Mrs. A's house.
 * Mrs. A and Mrs. B 4
 * Franklin takes Mrs. B and Mrs. A's husband to a local bar. The husband already has a thing for Mrs. B and she manages to seduce him at the bar. Franklin then takes a photo of Mrs. B performing oral sex on the husband. The photo is then sent to Mrs. A to rub it in her face.
 * Mrs. A and Mrs. B 5
 * Franklin is walking down the street when Mrs. A sees him - she is somewhat mad. Mrs. A picks up garden shears. Suddenly Mrs. B appears holding a golf club - a fight between the two women ensues. Franklin can either join in the fight and help or sit back and watch them kill each other.