100% Completion Breakdown

Story Missions [60%]
Each story mission is worth 0.6976744186046511627906976744186%.
There are 86 story missions to complete which give percentage.
The mission "One Last Thing" does not offer any percentage reward.

Side Jobs [10%]

• Assassination Missions
• Once you have completed all 9 of the assassin missions, you will receive 2%.
• You will unlock the assassination missions from a payphone in Alderney not long after unlocking the island.

• Little Jacob's Jobs
• Once you have completed all 10 of his drug delivery missions, you will receive 2%.
• Call Little Jacob and use the job option to begin these missions.

• Brucie's Car Thefts
• Once you have delivered all 10 of the cars, you will receive 2%.
• View your emails from Brucie. Those with attachments enable you to start the mission.

• Street Races
• Once you have won all 9 of the races, you will receive 2%.
• Call Brucie and use the Race option to arrange a street race.

• Stevie's Text Message Cars
• Once you have delivered all 30 cars, you will receive 2%.
• You will receive a text message from Stevie not long after doing races for Brucie.
• Each text message has a picture of a car attached. You must steal this exact car.

Police Missions [5%]

• Most Wanted
• Once you have killed all 10 Most Wanted criminals on each island, 30 in total, you will receive 2.5%.
• Get in a police car and use the computer to start these missions.

• Vigilante
• Once you have killed 20 criminals, you will receive 2.5%.
• The kills do not need to be consecutive. You can take as many tries as you like until you have killed 20 or more.

Friend Abilities [5%]

• Little Jacob's Gun Delivery Ability
• Once you reach 75% 'like' with Little Jacob, you will receive 1.6666666666666666666666666666667%.

• Brucie's Helicopter Ability
• Once you reach 75% 'like' with Brucie, you will receive 1.6666666666666666666666666666667%.

• Packie's Car Bomb Ability
• Once you reach 75% 'like' with Packie, you will receive 1.6666666666666666666666666666667%.

Friend Activities [5%]

• Little Jacob Activities
• Once you have completed all 6 activities (Darts, Drinking, Eating, Pool, Show, Strip Club), you will receive 1.6666666666666666666666666666667%.

• Brucie Activities
• Once you have completed all 7 activities (Boating, Bowling, Drinking, Eating, Heli Ride, Show, Strip Club), you will receive 1.6666666666666666666666666666667%.

• Packie Activities
  
• Once you have completed all 6 activities (Bowling, Darts, Drinking, Pool, Show, Strip Club), you will receive 1.6666666666666666666666666666667%.

Random Pedestrian Missions [5%]
Once you have completed all missions for a random pedestrian, you will receive 0.5%.
There are 10 random pedestrians to complete, giving a total of 5% available.
Some pedestrians have more than one mission. You will only be awarded the percentage after you have finished all of their missions.
The pedestrians you must meet and complete are:

• Brian (3 Meets)
• Badman
• Mel
• Ileyna Faustin
• Hossan
• Sara (2 Meets)
• Pathos (2 Meets)
• Marnie (2 Meets)
• Eddie Low (2 Meets)
• Gracie

Activities [5%]
Each Activity is worth 1.25%.
There are 4 activities to complete in total.
You must complete the following:

• Beat a friend at a game of Pool
• Beat a friend at a game of Darts
• Beat a friend at a FULL game of Bowling
• Beat the high score (get at least 11,000 points) on the QUB3D arcade game

Side Objectives [5%]

• Unique Jumps
• Once you have successfully completed all 50 jumps, you will receive 2.5%.

• Flying Rats
• Once you have killed all 200 flying rats, you will receive 2.5%.