You do not have to complete every task and mission in GTA V to get a 100% completion. Successfully complete the following tasks in GTA 5 to get a 100% completion:
Part 1
Successfully complete all 69 main missions in Story mode. The following is a list of all main missions in Story mode for Franklin, Michael, and Trevor:
Prologue
Franklin And Lamar
Repossession
Complications
Father/Son
Chop
Marriage Counseling
Daddy's Little Girl
Friend Request
Casing The Jewel Store
Carbine Rifles
The Jewel Store Job (The Loud Approach / The Smart Approach)
Mr. Philips
Nervous Ron
Trevor Philips Industries
Crystal Maze
Friends Reunited
Fame Or Shame
Dead Man Walking
Did Somebody Say Yoga
The Long Stretch
Hotel Assassination
The Multi Target Assassination
Three's Company
Hood Safari
By The Book
Scouting The Port
Minisub
Trash Truck
Boiler Suits
Masks
Tow Truck
The Merryweather Heist (Freighter / Offshore)
Blitz Play
Mr. Richards
I Fought The Law
Eye In The Sky
The Vice Assassination
The Bus Assassination
Caida Libre
Deep Inside
Minor Turbulence
The Construction Assassination
Paleto Score Setup
Military Hardware
Predator
The Paleto Score
Derailed
Monkey Business
Hang Ten
Surveying The Score
Bury The Hatchet
Pack Man
Fresh Meat
The Ballad Of Rocco
Cleaning Out The Bureau
Reuniting The Family
Architect's Plans
Legal Trouble
The Bureau Raid (Fire Crew / Roof Entry)
The Wrap Up
Lamar Down
Meltdown
Driller
Sidetracked
The Big Score (Subtle Approach / Obvious Approach)
The Third Way
Something Sensible
The Time's Come
Part 2
Successfully complete 42 of 59 hobbies and pastimes. Hobbies and pastimes are optional side missions scattered throughout San Andreas. Many of the hobbies and pastimes are unlocked through Strangers and Freaks missions. The following is a list of the hobbies and pastimes that count towards a 100% completion in Grand Theft Auto 5:
Shooting Range: Hand Guns
Shooting Range: Submachine Guns
Shooting Range: Assault Rifles
Shooting Range: Shotguns
Shooting Range: Light Machine Guns
Shooting Range: Heavy
Street Race: South Los Santos
Street Race: City Circuit
Street Race: Airport
Street Race: Freeway
Street Race: Vespucci Canals
Win at Tennis
Play 9 holes of Golf and finish even or below par
Win at Darts
Get a private dance at the Strip Club
Triathlon 1: Vespucci Canals
Triathlon 2: Alamo Sea
Triathlon 3: Coyote Cross Country
Offroad Race 1: Canyon Cliffs
Offroad Race 2: Ridge Run
Offroad Race 3: Mineward Spiral
Offroad Race 4: Valley Trail
Offroad Race 5: Lakeside Splash
Offroad Race 6: Eco Friendly
Flight School: Training Take Off
Flight School: Runway Landing
Flight School: Inverted Flight
Flight School: Knife Flight
Flight School: Flat Hatting
Flight School: Touch Down
Flight School: Loop the loop
Flight School: Helicopter Course
Flight School: Helicopter Speed Run
Flight School: Skydiving
Flight School: Drop Zone
Flight School: Earn Your Wings
Sea Race: East Coast
Sea Race: North East Coast
Sea Race: Raton Canyon
Sea Race: Lost Santos
Perform Yoga
Parachuting: Complete all Base Jumps
Parachuting: Complete all Heli Jumps
The following is a list of the hobbies and pastimes that do not count towards a 100% completion in Grand Theft Auto V:
Stunt Plane Time Trials
Bail Bonds - Quarry
Bail Bonds - Farm
Bail Bonds - Mountain
Bail Bonds - Hobo
Arms Traffic Air 1
Arms Traffic Air 2
Arms Traffic Air 3
Arms Traffic Air 4
Arms Traffic Air 5
Arms Traffic Ground 1
Arms Traffic Ground 2
Arms Traffic Ground 3
Arms Traffic Ground 4
Arms Traffic Ground 5
Hunting
Part 3
Successfully complete 20 of 58 Strangers and Freaks missions. Strangers and Freaks are optional side missions scattered throughout San Andreas that feature encounters with crazy and unusual characters. Successfully completing many of these missions will unlock other missions and collectibles. The following is a list of all 58 Strangers and Freaks missions:
Pulling Favors
Pulling Another Favor
Pulling Favors Again
Still Pulling Favors
Pulling One Last Favor
Shift Work
Paparazzo
Paparazzo The Sex Tape
Paparazzo The Partnership
Paparazzo Reality Check
A Starlet in Vinewood
Grass Roots - Franklin
Grass Roots - The Smoke-In
Exercising Demons - Franklin
Far Out
The Final Frontier
Risk Assessment
Liquidity Risk
Targeted Risk
Uncalculated Risk
Grass Roots - Michael
Grass Roots - Trevor
Exercising Demons - Michael
Exercising Demons - Trevor
Seeking the Truth
Accepting the Truth
Assuming the Truth
Chasing the Truth
Bearing the Truth
Delivering the Truth
Exercising the Truth
Unknowing the Truth
Rampage One
Rampage Two
Rampage Three
Rampage Four
Rampage Five
Target Practice
Fair Game
The Civil Border Patrol
An American Welcome
Minute Man Blues
Special Bonds
Death At Sea
Nigel and Mrs. Thornhill
Vinewood Souvenirs - Willie
Vinewood Souvenirs - Tyler
Vinewood Souvenirs - Kerry
Vinewood Souvenirs - Mark
Vinewood Souvenirs - Al Di Napoli
Vinewood Souvenirs - The Last Act
Extra Commission
Closing the Deal
Surreal Estate
Breach of Contract
Mrs. Philips
Damaged Goods
The Last One
Part 4
Successfully complete 14 of 57 random events. Random events are encounters and short missions that randomly spawn throughout San Andreas. Random events often allow you to make a choice about whether to help or hurt another person. The following is a list of all 57 random events:
ATM Robbery
Bike Thief City 1
Bike Thief City 2
Bus Tour
Construction Accident
Escape Paparazzi
Gang Intimidation
Getaway Driver
Mugging 1
Mugging 2
Mugging 3
Security Van 1
Security Van 2
Security Van 3
Security Van 4
Security Van 5
Security Van 6
Security Van 7
Security Van 8
Security Van 9
Security Van 10
Shop Robbery 1
Shop Robbery 2
Snatched
Sport Bike Thief
Simeon Yetarian
Abandoned Vehicle 1
Abandoned Vehicle 2
Arrests 1
Arrests 2
Border Patrol 1
Border Patrol 2
Border Patrol 3
Burial
Car Theft 1
Car Theft 2
Chase Thieves City 1
Chase Thieves City 2
Chase Thieves Country 1
Chase Thieves Country 2
Countryside Gang Fight
Countryside Robbery
Crash Rescue
Deal Gone Wrong
Domestic
Drug Shootout
Drunk Driver 1
Drunk Driver 2
Hitch Lift 1
Hitch Lift 2
Hitch Lift 3
Hitch Lift 4
Rogue Altruists
Luring Girl Into Alley
Prisoner Lift 1
Prisoner Lift 2
Stag Do Running Man
Part 5
Successfully complete 16 miscellaneous missions. The following is a list of 16 miscellaneous missions that count towards getting a 100% completion:
Purchase any 5 properties
Purchase a vehicle from a website
Collect 50 Spaceship Parts
Collect 50 Letter Scraps
Walk and play fetch with Chop
Complete a Booty Call
Receive a Prostitute service
Hold Up a Store
Complete 25 x Under The Bridge
Complete 8 x Knife Flights
Complete 25 x Stunt Jumps
Visit the Cinema
Friend Activity: Visit a Bar
Friend Activity: Visit the Cinema
Friend Activity: Visit the Strip Club
Friend Activity: Play Darts
Part 1
Successfully complete all 69 main missions in Story mode. The following is a list of all main missions in Story mode for Franklin, Michael, and Trevor:
Prologue
Franklin And Lamar
Repossession
Complications
Father/Son
Chop
Marriage Counseling
Daddy's Little Girl
Friend Request
Casing The Jewel Store
Carbine Rifles
The Jewel Store Job (The Loud Approach / The Smart Approach)
Mr. Philips
Nervous Ron
Trevor Philips Industries
Crystal Maze
Friends Reunited
Fame Or Shame
Dead Man Walking
Did Somebody Say Yoga
The Long Stretch
Hotel Assassination
The Multi Target Assassination
Three's Company
Hood Safari
By The Book
Scouting The Port
Minisub
Trash Truck
Boiler Suits
Masks
Tow Truck
The Merryweather Heist (Freighter / Offshore)
Blitz Play
Mr. Richards
I Fought The Law
Eye In The Sky
The Vice Assassination
The Bus Assassination
Caida Libre
Deep Inside
Minor Turbulence
The Construction Assassination
Paleto Score Setup
Military Hardware
Predator
The Paleto Score
Derailed
Monkey Business
Hang Ten
Surveying The Score
Bury The Hatchet
Pack Man
Fresh Meat
The Ballad Of Rocco
Cleaning Out The Bureau
Reuniting The Family
Architect's Plans
Legal Trouble
The Bureau Raid (Fire Crew / Roof Entry)
The Wrap Up
Lamar Down
Meltdown
Driller
Sidetracked
The Big Score (Subtle Approach / Obvious Approach)
The Third Way
Something Sensible
The Time's Come
Part 2
Successfully complete 42 of 59 hobbies and pastimes. Hobbies and pastimes are optional side missions scattered throughout San Andreas. Many of the hobbies and pastimes are unlocked through Strangers and Freaks missions. The following is a list of the hobbies and pastimes that count towards a 100% completion in Grand Theft Auto 5:
Shooting Range: Hand Guns
Shooting Range: Submachine Guns
Shooting Range: Assault Rifles
Shooting Range: Shotguns
Shooting Range: Light Machine Guns
Shooting Range: Heavy
Street Race: South Los Santos
Street Race: City Circuit
Street Race: Airport
Street Race: Freeway
Street Race: Vespucci Canals
Win at Tennis
Play 9 holes of Golf and finish even or below par
Win at Darts
Get a private dance at the Strip Club
Triathlon 1: Vespucci Canals
Triathlon 2: Alamo Sea
Triathlon 3: Coyote Cross Country
Offroad Race 1: Canyon Cliffs
Offroad Race 2: Ridge Run
Offroad Race 3: Mineward Spiral
Offroad Race 4: Valley Trail
Offroad Race 5: Lakeside Splash
Offroad Race 6: Eco Friendly
Flight School: Training Take Off
Flight School: Runway Landing
Flight School: Inverted Flight
Flight School: Knife Flight
Flight School: Flat Hatting
Flight School: Touch Down
Flight School: Loop the loop
Flight School: Helicopter Course
Flight School: Helicopter Speed Run
Flight School: Skydiving
Flight School: Drop Zone
Flight School: Earn Your Wings
Sea Race: East Coast
Sea Race: North East Coast
Sea Race: Raton Canyon
Sea Race: Lost Santos
Perform Yoga
Parachuting: Complete all Base Jumps
Parachuting: Complete all Heli Jumps
The following is a list of the hobbies and pastimes that do not count towards a 100% completion in Grand Theft Auto V:
Stunt Plane Time Trials
Bail Bonds - Quarry
Bail Bonds - Farm
Bail Bonds - Mountain
Bail Bonds - Hobo
Arms Traffic Air 1
Arms Traffic Air 2
Arms Traffic Air 3
Arms Traffic Air 4
Arms Traffic Air 5
Arms Traffic Ground 1
Arms Traffic Ground 2
Arms Traffic Ground 3
Arms Traffic Ground 4
Arms Traffic Ground 5
Hunting
Part 3
Successfully complete 20 of 58 Strangers and Freaks missions. Strangers and Freaks are optional side missions scattered throughout San Andreas that feature encounters with crazy and unusual characters. Successfully completing many of these missions will unlock other missions and collectibles. The following is a list of all 58 Strangers and Freaks missions:
Pulling Favors
Pulling Another Favor
Pulling Favors Again
Still Pulling Favors
Pulling One Last Favor
Shift Work
Paparazzo
Paparazzo The Sex Tape
Paparazzo The Partnership
Paparazzo Reality Check
A Starlet in Vinewood
Grass Roots - Franklin
Grass Roots - The Smoke-In
Exercising Demons - Franklin
Far Out
The Final Frontier
Risk Assessment
Liquidity Risk
Targeted Risk
Uncalculated Risk
Grass Roots - Michael
Grass Roots - Trevor
Exercising Demons - Michael
Exercising Demons - Trevor
Seeking the Truth
Accepting the Truth
Assuming the Truth
Chasing the Truth
Bearing the Truth
Delivering the Truth
Exercising the Truth
Unknowing the Truth
Rampage One
Rampage Two
Rampage Three
Rampage Four
Rampage Five
Target Practice
Fair Game
The Civil Border Patrol
An American Welcome
Minute Man Blues
Special Bonds
Death At Sea
Nigel and Mrs. Thornhill
Vinewood Souvenirs - Willie
Vinewood Souvenirs - Tyler
Vinewood Souvenirs - Kerry
Vinewood Souvenirs - Mark
Vinewood Souvenirs - Al Di Napoli
Vinewood Souvenirs - The Last Act
Extra Commission
Closing the Deal
Surreal Estate
Breach of Contract
Mrs. Philips
Damaged Goods
The Last One
Part 4
Successfully complete 14 of 57 random events. Random events are encounters and short missions that randomly spawn throughout San Andreas. Random events often allow you to make a choice about whether to help or hurt another person. The following is a list of all 57 random events:
ATM Robbery
Bike Thief City 1
Bike Thief City 2
Bus Tour
Construction Accident
Escape Paparazzi
Gang Intimidation
Getaway Driver
Mugging 1
Mugging 2
Mugging 3
Security Van 1
Security Van 2
Security Van 3
Security Van 4
Security Van 5
Security Van 6
Security Van 7
Security Van 8
Security Van 9
Security Van 10
Shop Robbery 1
Shop Robbery 2
Snatched
Sport Bike Thief
Simeon Yetarian
Abandoned Vehicle 1
Abandoned Vehicle 2
Arrests 1
Arrests 2
Border Patrol 1
Border Patrol 2
Border Patrol 3
Burial
Car Theft 1
Car Theft 2
Chase Thieves City 1
Chase Thieves City 2
Chase Thieves Country 1
Chase Thieves Country 2
Countryside Gang Fight
Countryside Robbery
Crash Rescue
Deal Gone Wrong
Domestic
Drug Shootout
Drunk Driver 1
Drunk Driver 2
Hitch Lift 1
Hitch Lift 2
Hitch Lift 3
Hitch Lift 4
Rogue Altruists
Luring Girl Into Alley
Prisoner Lift 1
Prisoner Lift 2
Stag Do Running Man
Part 5
Successfully complete 16 miscellaneous missions. The following is a list of 16 miscellaneous missions that count towards getting a 100% completion:
Purchase any 5 properties
Purchase a vehicle from a website
Collect 50 Spaceship Parts
Collect 50 Letter Scraps
Walk and play fetch with Chop
Complete a Booty Call
Receive a Prostitute service
Hold Up a Store
Complete 25 x Under The Bridge
Complete 8 x Knife Flights
Complete 25 x Stunt Jumps
Visit the Cinema
Friend Activity: Visit a Bar
Friend Activity: Visit the Cinema
Friend Activity: Visit the Strip Club
Friend Activity: Play Darts