• GTA III Story Missions
  
• Complete all 50 Storyline Missions
  
• Complete all 17 Pay Phone missions
  
• GTA III Side Missions & Activities
  
• Complete all 4 Vehicle Sub-Missions
  
• Complete all 4 Off-Road Challenges
  
• Complete all 4 RC Missions
  
• Complete all 3 Import / Export Vehicle Lists
  
• GTA III Collectibles
  
• Complete all 20 Rampages
  
• Complete all 20 Stunt Jumps
  
• Collect all 100 Hidden Packages
  
• GTA III 100% Completion Rewards
  
• Warning: GTA III 100% Completion Glitches
  
• GTA III 100% Completion Video Walkthrough

GTA III Story Missions
Claude, the protagonist of Grand Theft Auto III, walks his way up through the mafia ladder of the crime-ridden Liberty City. Throughout his journey, he must complete missions and tasks for friends, foes, and acquaintances, all of which are required for 100% completion of GTA III.


Complete all 50 Storyline Missions
Play through the story of Claude by completing all 50 main story missions, from Give Me Liberty to The Exchange.

WARNING: GTA III has 10 missable missions that will become permanently inaccessible if you play them in the wrong order. If you want to achieve 100% completion and make sure you don't miss any of these missions, you must:

• Complete all the Joey's and Luigi's missions before playing "Last Requests" for Salvatore
  
• Complete all the Kenji Kasen missions before playing "Waka-Gashira Wipeout!" for Donald Love
  
• Complete "Two-Faced Tanner" before playing "Grand Theft Aero" for Donald Love

Complete all 17 Pay Phone missions
They can be accessed at different payphones on the three islands in Liberty City, and are given by El Burro, Marty Chonks, King Courtney, and D-Ice.


GTA III Side Missions & Activities
Claude can take part in, completing off-road missions to impersonating firefighters and paramedics. All of the following tasks must be done for 100% completion of GTA III.

Complete all 4 Vehicle Sub-Missions

• Firefighter: extinguish a total of 60 fires (20 on each island)
  
• Paramedic: reach and complete Level 12
  
• Vigilante: take down a total of 60 criminals (20 on each island)
  
• Taxi Driver: complete a total of 100 Taxi Fares

• Complete all 4 Off-Road Challenges
  
• Complete all 4 RC Missions
  
• Complete all 3 Import / Export Vehicle Lists
  
• Complete all 20 Rampages
  
• Complete all 20 Stunt Jumps
  
• Collect all 100 Hidden Packages

GTA III 100% Completion Rewards
Completion of Grand Theft Auto III does not directly reward the player with any benefits, but the activities completed to achieve 100% completion offer several rewards, such as:

• Pick-ups for every gun, and pick-ups for armor, health, and police bribes at the player's safehouse.
  
• Infinite sprint ability
  
• Pick-ups for a great number of vehicles at the Import/Export garages
  
• The Borgnine Taxi

Plus, obtaining 100% Completion in GTA III unlocks the achievement "Is That All You’ve Got?".

Warning: GTA III 100% Completion Glitches


There are two potential glitches in GTA III that could prevent you from achieving 100% Completion. When playing through the game, be careful about these issues:

GTA III 100% Achievement Glitch: Do not leave the phone mission "Kingdom Come" until last. If this is your final item for 100% completion, the achievement "Is That All You’ve Got?" will not pop despite having 100% completion in your stats. Make sure you leave something else as your last objective to complete.

GTA III Purple Nines Glitch: After completing D-Ice's phone mission "Rumble", the Purple Nines gang members disappear from the city, which is intended. However, the issue is that their absence carries over when you start a new playthrough, which would stop you from achieving 100% completion on that new game file. If you need to start a new playthrough, make sure to first delete all of your saves - or alternatively, reload an existing save from the beginning of the game instead. (Also feel free to back up your saves in a different folder before you delete them.)

This was everything you needed to know to achieve 100% Completion in GTA 3! I have also linked a video to help with the checklist.

There are 67 missions in total in the story-line of Grand Theft Auto III, with 50 main missions plus 17 optional Pay Phone Missions which are not required for story progression. However, the Phone missions are still necessary for 100% completion of the game.

The GTA 3 missions below are listed in chronological order, grouped by the Location/Area they take place in, and the walk-through also applies to the GTA III Definitive Edition.

Warning: Missable Missions in GTA 3
Generally, since some missions from different contacts become available at the same time, they can be played in a slightly different order.

However, GTA III has 10 missable missions that will become permanently inaccessible if you play them in the wrong order. If you miss these missions, you can still progress through the story, but you will be locked out of achieving 100% completion on the current save file.
If you want to achieve 100% completion and make sure you don't miss any of these missions, you must:

Complete all the Joey's and Luigi's missions before playing "Last Requests" for Salvatore
Complete all the Kenji Kasen missions before playing "Waka-Gashira Wipeout!" for Donald Love
Complete "Two-Faced Tanner" before playing "Grand Theft Aero" for Donald Love
I will list the GTA 3 missions in the correct order below and mark the MISSABLE missions. I would strongly advised to make multiple save files that you can go back to in case you made a mistake and accidentally skipped a mission.


Portland Missions
Below you find the list of GTA 3 Missions taking place on the island of Portland. There are 22 main missions in this section before Staunton Island is unlocked. There are also 8 Pay Phone missions in Portland.

1. Give Me Liberty

It's the 1° mission in GTA III in chronological order, and it takes place in Portland..
Claude is betrayed by his partner Catalina, leading to incarceration and a prison break. Now isolated on Portland Island, Claude and 8-Ball consider their next steps.

2. Luigi's Girls
Luigi Luigi Goterelli
Luigi asks Claude to pick up one of his girls, Misty, from the clinic.


3. Don't Spank Ma ♥♥♥♥♥ Up
Luigi Luigi Goterelli
Claude kills a local drug dealer to obtain his car for Luigi.


4. Drive Misty For Me
Luigi Luigi Goterelli
Misty needs picking up and taking to Joey Leone.


5. Pump-Action Pimp
Luigi Luigi Goterelli MISSABLE MISSION
Claude needs to 'take out' a couple of pimps.

Warning: Missable Mission
This is a missable mission, as it becomes unavailable if it's not completed before the mission "Last Requests". It's required for 100% completion of the game, so make sure you complete missions in order and don't miss this one.

6. The Fuzz Ball
Luigi Luigi Goterelli MISSABLE MISSION
Claude delivers prostitutes to a police ball.

Warning: Missable Mission & Achievement
This achievement can be missed so it's advised to make a save before starting this mission. It can be attained on the mission "THE FUZZ BALL" (Luigi's 5th mission) Here is a video where the location of Coach is a route you can take.

7. Mike Lips Last Lunch
Joey Leone Joey Leone
Joey is owed money by the Forelli brothers. He wants Claude to help him with some payback.

Warning: Missable Achievement Without a Scratch, Once you steal his car from the Bistro, just drive carefully making sure not to crash into anyone or anything.
It's the 7° mission in GTA III in chronological order, and it takes place in Portland. It becomes available after completing Drive Misty For Me.

8. Farewell 'Chunky' Lee Chong
Joey Leone Joey Leone
Claude is instructed by Joey to kill Lee Chong.

Warning: Missable Achievement
This achievement can be missed so it's advised to make a save before starting this mission. It's Joeys 2nd mission we need to grab chunkies car and plant a bomb in it using 8 balls garage. I found a video of the mission/achievement.

9. Van Heist
Joey Leone Joey Leone
Joey wants Claude to steal a Securicar van.


10. Cipriani's Chauffeur
Joey Leone Joey Leone
Claude chauffeurs Toni around Liberty City.


11. Dead Skunk in the Trunk
Joey Leone Joey Leone MISSABLE MISSION
A body of one of the Forelli Brothers needs disposing of.

Warning: Missable Mission
This is a missable mission, as it becomes unavailable if it's not completed before the mission "Last Requests".

12. The Getaway
Joey Leone Joey Leone MISSABLE MISSION
Joey has one last job for Claude.

Warning: Missable Mission
This is a missable mission, as it becomes unavailable if it's not completed before the mission "Last Requests".

13. Taking Out The Laundry
Toni Cipriani Toni Cipriani
Claude is tasked with destorying a handful of vans.


14. The Pick-Up
Toni Cipriani Toni Cipriani
While collecting a 'payment', Claude has to deal with some Triads.


15. Salvatore's Called A Meeting
Toni Cipriani Toni Cipriani
Claude's on chauffeur duty for Toni.


16. Chaperone
Salvatore Leone Salvatore Leone
It's another chauffeur job for Claude. This time, he has to look after Maria.


17. Triads and Tribulations Missable Achievement
Toni Cipriani Toni Cipriani
Some Triads need dealing with.

Warning: Missable Achievement Mob Boss achievement. Make sure you save before you start this mission in short all you have to do is keep the two mafia members alive during the mission.

18. Blow Fish
Toni Cipriani Toni Cipriani
Toni wants the Triads dealt with once and for all.


19. Cutting The Grass
Salvatore Leone Salvatore Leone
There's a rat in the Leone Family and Claude needs to sniff him out.


20. Bomb Da Base: Act I
Salvatore Leone Salvatore Leone
Salvatore wants Claude to destory the freighter being used to make SPANK.


21. Bomb Da Base: Act II
8 Ball 8-Ball
Claude meets with 8-Ball to carry out the attack on the SPANK freighter.

20. Bomb Da Base: Act I
Salvatore Leone Salvatore Leone
Salvatore wants Claude to destory the freighter being used to make SPANK.


21. Bomb Da Base: Act II
8 Ball 8-Ball
Claude meets with 8-Ball to carry out the attack on the SPANK freighter.


22. Last Requests
Salvatore Leone Salvatore Leone
Salvatore has one last job for Claude.

Warning: Missable Missions
Playing this mission prevents from completing any remaining missions for Luigi Goterelli, Joey Leone, Toni Cipriani & Payphone mission You should first complete those missions before playing this mission, if you want to achieve 100% Completion. Rewards: $20,000; Access to Staunton Island and a new Safe house.

Portland Pay Phone Missions (El Burro & Marty Chonks)
These are all optional missions, but it is required for 100% completion of the game.


23. Phone Mission 1 Turismo
is an optional Pay Phone mission in GTA 3, given to Claude by El Burro.

It's the 23° mission in GTA III in chronological order, and it takes place in Portland. It becomes available after completing 9th mission called Van Heist.

24. Phone Mission 2 - I Scream, You Scream
Claude bombs a group of gang members using an ice-cream van.


25. Phone Mission 3 - Trial By Fire
Phone El Burro
Triads have stolen one of El Burro's cars and burned it. Return the favour by burning them.


26. Phone Mission 4 - Big'N Veiny
Phone El Burro
Collect some magazines that have been stolen.

Rewards: $20,000 plus $10,000 if all the magazines were collected.

27. Phone Mission 5 - The Crook
Marty Chonks


Marty Chonks Pay Phone does not have a blip on the map. It's located outside of his factory in Trenton, near Joey's Garage, and it only rings between 9:00 to 19:00.
It's the 27° mission in GTA III in chronological order, and it takes place in Portland. It becomes available after completing Drive Misty For Me.


Marty wants Claude to have a "chat" with someone.

28. Phone Mission 6 - The Thieves
Two thieves need dealing with.


29. Phone Mission 7 - The Wife
Mrs. Chonks is causing money problems that Marty wants sorting.


30. Phone Mission 8 - Her Lover
Mrs. Chonks was having an affair. Deal with her lover.

Below you find the list of GTA 3 Missions taking place on Staunton Island. There are 27 main missions plus 4 Pay Phone missions in Staunton Island.
Access to the third island, Shoreside Vale, is unlocked after completing A Drop In The Ocean.

23. Sayonara Salvatore
Claude wants to make an alliance with the Yakuza.


24. Under Surveillance
Asuka needs some FBI dealing with.


25. Paparazzi Purge
Paparazzi have been snooping around in the Yakuza's business.


26. Payday For Ray
Asuka needs a payment delivered.


27. Two-Faced Tanner
Asuka Kasen MISSABLE MISSION
Tanner needs taking out.

It's the 35° mission in GTA III in chronological order, and it takes place in Staunton Island. It becomes available after completing Payday For Ray.

Warning: Missable Mission
This is a missable mission, as it becomes unavailable if it's not completed before the mission "Grand Theft Aero". It's required for 100% completion of the game, so make sure you complete missions in order and don't miss this one.

28. Kanbu Bust-out
Kenji Kasen MISSABLE MISSION
Claude busts Kanbu out of jail.

It's the 36° mission in GTA III in chronological order, and it takes place in Staunton Island. It becomes available after completing Under Surveillance.

Warning: Missable Mission This is a missable mission, as it becomes unavailable if it's not completed before the mission "Waka-Gashira Wipe Out".

29. Grand Theft Auto
Kenji MISSABLE MISSION
Claude steals some sports cars for Kenji.

It's the 37° mission in GTA III in chronological order, and it takes place in Staunton Island. It becomes available after completing Kanbu Bust-out.

Warning: Missable Mission This is a missable mission, as it becomes unavailable if it's not completed before the mission "Waka-Gashira Wipe Out".

30. Deal Steal
Kenji MISSABLE MISSION
Kenji sends Claude to infiltrate a meeting between the Colombian Cartel and the Yardies.

It's the 38° mission in GTA III in chronological order, and it takes place in Staunton Island. It becomes available after completing Grand Theft Auto.

Warning: Missable Mission This is a missable mission, as it becomes unavailable if it's not completed before the mission "Waka-Gashira Wipe Out".

31. Shima
Kenji MISSABLE MISSION
Money needs collecting but the Diablos aren't making it easy.

It's the 39° mission in GTA III in chronological order, and it takes place in Staunton Island. It becomes available after completing Grand Theft Auto.

Warning: Missable Mission This is a missable mission, as it becomes unavailable if it's not completed before the mission "Waka-Gashira Wipe Out".

32. Smack Down
Kenji MISSABLE MISSION
Yardie drug dealers need taking out.
Rewards: $10,000 plus $1,000 for each Yardie killed

It's the 40° mission in GTA III in chronological order, and it takes place in Staunton Island. It becomes available after completing Grand Theft Auto.

Warning: Missable Mission This is a missable mission, as it becomes unavailable if it's not completed before the mission "Waka-Gashira Wipe Out".

33. Silence The Sneak
Ray's former partner is snitching on him. Ray needs Claude to deal with it.


34. Arms Shortage
Ray Machowski

Defend Phil Cassidy from the Colombian Cartel.
Rewards: $10,000; Phil's Army Surplus

35. Evidence Dash
Claude needs to collect some evidence for Ray.


36. Gone Fishing
Ray wants Claude to kill his partner.


37. Plaster Blaster
Leon McAffrey survived! But now Claude must get rid of him once and for all.


38. Liberator
Donald Love

"Old Oriental Gentleman" needs saving.

39. Waka-Gashira Wipeout!
Donald wants Claude to start a gang war between the Yazuka and the Colombian Cartel.


40. A Drop In The Ocean
Claude picks up some packages that have been dropped out at sea.

Rewards: $10,000; Access to Shoreside Vale; Shoreside Vale Safehouse

41. Grand Theft Aero
The packages were decoys!! Go collect the real packages.


42. Escort Service
Escort a Securicar.


43. Decoy
Claude needs to act as a decoy for the Old Oriental Gentleman.


44. Love's Disappearance
Claude visits Donal but finds him nowhere to be found.


45. Marked Man
Ray wants Claude to escort him to the airport.

Rewards: $20,000 plus $20,000 in Ray's lockup

46. Bait
Lure three death squads into traps.


47. Espresso-2-Go!
Destory espresso stands used by the Colombian Cartel to sell SPANK.


48. S.A.M.
Asuka tasks Claude with blowing up a DeadDodo containing SPANK.

Find the boat and get to the marker buoy!
Get to the runway marker buoys! The plane is on its final approach!!
Collect the cargo!
1 OF 8
2 OF 8
3 OF 8
4 OF 8
5 OF 8
6 OF 8
7 OF 8
Stash the SPANK back at the construction site!

49. Ransom
Claude heads back to the construction site where things have gone very wrong.

Staunton Island (King Courtney)

Phone Mission 9 - Bling-Bling Scramble
Phone King Courtney King Courtney
Claude enters a street race.

Rewards: $1,000 for each checkpoint Claude drives through, $15,000 is the maximum amount.

It's the 54° mission in GTA III in chronological order, and it takes place in Staunton Island. It becomes available after completing Sayonara Salvatore.

This is an optional mission, but it is required for 100% completion of the game.

Phone Mission 10 - Uzi Rider
Phone King Courtney King Courtney
Claude needs to waste 10 Diablo members from the comfort of his car.

It's the 55° mission in GTA III in chronological order, and it takes place in Staunton Island. It becomes available after completing Bling-Bling Scramble.

Phone Mission 11 - Gangcar Round-Up
Phone King Courtney King Courtney
King Courtney needs Claude to steal some rival gangs cars.

It's the 56° mission in GTA III in chronological order, and it takes place in Staunton Island.

Phone Mission 13 - Kingdom Come
Phone King Courtney King Courtney
Claude is betrayed by King Courtney.

It's the 57° mission in GTA III in chronological order, and it takes place in Staunton Island

Only one main story mission happens in Shoreside Vale Island, which is the very final mission of GTA 3. In addition, there are also 5 Pay Phone missions taking place in Shoreside Vale.

Pay Phone Missions (Optional)
However, if you want to achieve 100% completion, it is strongly advised to play these missions as soon as available on the respective island. The more you progress through the story, the more gangs will become increasingly hostile to you, which will make it a lot harder to complete these missions.

In particular, make sure to complete all Portland's phone missions before "Sayonara Salvatore", as after that mission Mafia will make your life really difficult in Portland.

50. The Exchange
Catalina Catalina
Rescue Maria and kill Catalina.

Rewards: $1,000,000

The Exchange is the 67° and final mission in GTA III in chronological order, and it takes place in Shoreside Vale. It becomes available after completing Ransom.

Shoreside Vale Pay Phone Missions (Optional) (D-Ice)


Phone Mission 13. Uzi Money
Phone D Ice D-Ice
D-Ice wants Purple Nines members dealt with.

• remember only Uzi drive by kills count!
  
• Ice 20 Purple Nines in 2 minutes 30 seconds.
  
• The 'Nines' walk their turf in Wichita Gardens.

It's the 58° mission in GTA III in chronological order, and it takes place in Shoreside Vale. It becomes available after completing A Drop In The Ocean.

Phone Mission 14 - Toyminator
Destroy three Securicars.

It's the 59° mission in GTA III in chronological order, and it takes place in Shoreside Vale. It becomes available after completing Uzi Money.

Phone Mission 15 - Rigged to Blow
A car rigged with a bomb needs defusing.

• Get to the garage but watch out if the car takes too much damage it will blow!
  
• Get the car repaired!
  
• Take the car back it has to be in perfect condition - no damage!
  
• Get out of the vehicle!

It's the 60° mission in GTA III in chronological order, and it takes place in Shoreside Vale. It becomes available after completing Toyminator.

Phone Mission 16 - Bullion Run
Claude needs to collect some platinum bullion pieces.

• Get a vehicle!
  
• Head to the location where the cargo is scattered, you need to collect 30 pieces of bullion.
  
• Remember when the vehicle come too heavy and slow goto the garage and drop off the cargo.

It's the 61° mission in GTA III in chronological order, and it takes place in Shoreside Vale. It becomes available after completing Rigged to Blow.

Phone Mission 17 - Rumble
Clear out the remaining Purple Nines members.

It's the 62° mission in GTA III in chronological order, and it takes place in Shoreside Vale. It becomes available after completing Bullion Run.

These include the classic vehicles-based Sub-Missions (such as Vigilante, Firefighter, Paramedic and Taxi Driver), 4 RC Toyz Missions, 4 Off-Road Challenges, and other extra activities in GTA 3.

It is strongly advised to complete these missions as soon as possible on each island. The more you progress through the story, the more gangs will become hostile to you, which will make it a lot harder to complete these tasks.

Firefighter

FIREFIGHTER - MISSION DETAILS:
The Firefighter side mission can be toggled on or off at any time while driving a Fire Truck.

The player has to extinguish 20 fires on every island, adding up to 60 fires in total. The fires can be put out by using the Fire Truck's water hose. The locations of the fires are indicated on the mini map after each fire is extinguished.

It is not necessary to do 20 fires in a row, you just need to put out 20 fires on each island in total.

FIREFIGHTER: REWARD
After successfully completing the side-mission, the player will find a Flamethrower at every hideout.


Paramedic

PARAMEDIC - MISSION DETAILS:
The Paramedic side mission can be toggled on or off at any time while driving an Ambulance.

The player has to locate, pick up and deliver patients to the hospital within a time limit. The hospital is always the closest to where the player started the side mission, and each new level adds one new patient to collect.

The Ambulance can carry up to three patients at a time, meaning multiple trips to the hospital will be required for higher levels.

The side mission can be failed by leaving the Ambulance, if the Ambulance gets destroyed, or by killing a patient. A patient can be killed from driving the Ambulance too recklessly. Failing the missions requires the player to begin from level 1.

It is strongly advised to complete the Paramedic mission as soon as possible in Portland or Staunton Island. The more you progress through the story, the more gangs will become hostile to you, which will make it a lot harder to complete this mission.

PARAMEDIC: REWARD

Every level awards the player with an amount of money, calculated by the formula $100 × x2, where x is the current level. Therefore, the player receives $100 for level 1, $400 for level 2, up to $14,400 for level 12.

Paramedic: Level Rewards
LEVEL REWARD
1 $100
2 $400
3 $900
4 $1,600
5 $2,500
6 $3,600
7 $4,900
8 $6,400
9 $8,100
10 $10,000
11 $12,100
12 $14,400
TOTAL $65,000
There are additional rewards for reaching certain milestones in the Paramedic side-mission.

• Rescuing 43 patients will have a health pickup be present at all safehouses.
  
• Rescuing 78 patients will have an Adrenaline pickup be present at all safehouses.
  
• Completing level 12 will award the player with infinite sprint.

Taxi Driver

TAXI DRIVER - MISSION DETAILS:
The Taxi Driver side-mission can be toggled on or off at any time while driving a Taxi.

The mission requires the player to drive passengers to specific locations within a time limit, for a cash reward. Once a pedestrian enters the vehicle, the destination is displayed on-screen and is marked by a blip on the radar.

If the player runs out of time, exits the Taxi or damages it too badly, the passenger will flee. It's possible to repair a damaged Taxi at Pay 'n' Spray to resume collecting passengers.

TAXI DRIVER: REWARD
Every fare will award the player an amount of cash.

Completing 100 total fares will unlock the Borgnine cab to spawn at the Borgnine Taxis company in Harwood.

Vigilante

VIGILANTE - MISSION DETAILS:
he Vigilante side mission can be toggled on or off at any time while driving a Law Enforcement Vehicle.The player has to chase down and kill criminals that are indicated in-game through the police dispatcher within a time limit. The criminals spawn in vehicles and will flee, but can also attack the player.

If the criminal's vehicle catches fire or is held in place, the occupant will bail out and run or attempt to acquire a new vehicle. As the player completes more levels, the targets will wield stronger weapons.

The mission will fail if the player remains outside of a Law Enforcement vehicle for over 60 seconds, dies, the timer runs out, or the player is arrested. It is important to note that Vigilante does not grant immunity from the police, which will often pursue the player, making the mission a lot harder.

VIGILANTE: REWARD
Completing 10 Total Criminal Kills on an island will award 1 Police Bribe at every Hideout.
Completing 20 Total Criminal Kills on an island will award 1 extra Police Bribe at every Hideout.
Killing 20 Criminals on each island will award a total of 6 Police Bribes at the player's Hideouts.

Off-Road Challenges
A Ride in the Park

The "A Ride in the Park" side-mission is an off-road mission, where the player has to collect 12 checkpoints before the time runs out. The mission is triggered by entering the parked Landstalker near the barn in Belleville Park.
A timer starts once the first checkpoint is collected, and every checkpoint hit adds a 10-second bonus to the timer, up to 120 second to complete the mission.
Below you find the optimal route to take for completing the mission in time.


Gripped!

The Gripped! side-mission is an off-road mission, where the player has to collect 20 checkpoints before the time runs out. The mission is triggered by entering the parked Patriot at a picnic place in Wichita Gardens, Shoreside Vale.
A timer starts once the first checkpoint is collected, and every checkpoint hit adds a 15-second bonus to the timer, up to 5 minutes to complete the mission.

Multistorey Mayhem

The Multistorey Mayhem side-mission is a checkpoint mission, where the player has to collect 20 checkpoints before the time runs out.
The mission is triggered by bringing and entering a Stallion front of the Newport Multistory Car Park in Newport, Staunton Island.
A 20-second timer starts once the mission begins, and every checkpoint hit adds a 5-second bonus to the timer, adding up to 2 minutes to complete the mission.

Patriot Playground

The Patriot Playground side-mission is an off-road mission, where the player has to collect 15 checkpoints before the time runs out. The mission is triggered by entering the parked Patriot in the Supa Save! parking lot in Portland View.
A 20-second timer starts once the first checkpoint is collected, and every checkpoint hit adds a 20-second bonus to the timer, up to 5 minutes to complete the mission.

This is an optional endeavour, but it is required for 100% completion of the game. It's not time-sensitive, meaning it can be played at any point, even after the main storyline is completed. helpful video all 4 Off-Road Challenges

Import/Export

Import/Export is a side-mission where the player is required to deliver specific vehicles to certain garages and cranes for a sum of cash.

There are three Import/Export locations: the Portland Docks Garage, the Portland Docks Crane, and the Pike Creek (Shoreside Vale) Garage. Each location requires different vehicles and pays out a different reward.

After delivering all vehicles required for a certain garage/crane, floating pick-up icons will appear at the delivery location, allowing you to select and use any of those GTA 3 vehicles immediately, free of charge.

MPORT/EXPORT CARS LIST: PORTLAND DOCKS GARAGE
The Portland Docks requests vans, trucks, and various industrial/commercial vehicles.
Every vehicle delivered to the garage awards $1,000. Successfully completing the list gives a reward of $200,000.

Blista
Spawn Locations:
Found at the Liberty City Memorial Stadium parking area in Belleville Park, Staunton Island
Found at Asuka Kasen's Condo in Newport, Staunton Island
Found at a garage behind a high rise apartment in Newport, Staunton Island
Seen at the AMCo. Petroleum Company HQ's in Torrington, Staunton Island
Seen at the Francis International Airport parking area in Shoreside Vale
Found at the Apartment Parking Area in Wichita Gardens, Shoreside Vale
Can be seen driving around Staunton Island and Shoreside Vale

Bobcat
Spawn Locations:
Found at Marco's Bistro, Saint Mark's in Portland
Found at the AMCo. Petroleum Company station in Harwood, Portland
Found at the Capital Autos in Harwood, Portland
Seen on the Portland Beach in Portland
Found at the Liberty City Memorial Stadium parking lot in Belleville Park, Staunton Island
Seen at the Carson General Hospital in Rockford, Staunton Island
Can be found at the Staunton View picnic area, Cedar Grove, Shoreside Vale

Bus
Spawn Locations:
Found in Chinatown, Portland
Found at Aspatria, Staunton Island
Appears during the Firefighter side mission on Portland Island

Coach
Spawn Locations:
Seen parked at the bus depot in Trenton, Portland
Found throughout the city on main roads

Dodo
Spawn Locations:
Found in the green hangar of the Francis International Airport (Shoreside Vale), after Grand Theft Aero
Found in the southwestern hangar of the Francis International Airport (Shoreside Vale)
Found on the east end of the runway of the Francis International Airport (Shoreside Vale)

Flatbed
Spawn Locations:
Spawns rarely in Chinatown, Portland
Found rarely in Fort Staunton or Aspatria on Staunton Island

Linerunner
Spawn Locations:
Found in Portland Harbor, Portland Island
Seen at Greasy Joe's in Callahan Point, Portland Island
Found in Atlantic Quays, Portland Island

Moonbeam
Spawn Locations:
Found at the Garage 30, north of Momma's Restaurante in Saint Mark's, Portland
Found in Hepburn Heights, Portland
Found at Callahan Point, Portland
Found in the Carson General Hospital in Rockford, Staunton Island
Found in the Liberty Tree offices in Bedford Point, Staunton Island

Mr. Whoopee
Spawn Locations:
Rarely, found driving around Chinatown, Portland View, Saint Mark's, Rockford and Cedar Grove
Rarely found in the parking lot at the Staunton View Picnic Area in Wichita Gardens
Found driving around Cochrane Dam

Mule
Spawn Locations:
Found at Garage 7 in the Portland Harbor
Found in the parking area of the Portland Harbor
Found at the Liberty City Memorial Stadium in Belleville park, Staunton Island

Patriot
Spawn Locations:
Found at the Supa Save! In Portland View, Portland
Seen in the Shoreside Park in Shoreside Vale
Seen in the Newport Multistory Car Park
Found in Saint Mark's

Pony
Spawn Locations:
Found at the Supa Save! In Portland Harbor, Portland Island
Seen parked in an alleyway near Kai Lee's Hot Sauce Company in Chinatown, Portland Island
Seen at the parking lot of the AMCo. Petroleum Company in Trenton
Found at the car crusher in Harwood, Portland Island

Rumpo
Spawn Locations:
Seen near 8-Ball's bomb shop in Harwood
Seen parked near the northwest side of the Liberty City Sawmill in Callahan Point

Securicar
Spawn Locations:
Spawns around Staunton Island
Found driving between Chinatown and Harwood
Seen driven in Bedford Point

Trashmaster
Spawn Locations:
Spawns around Aspatria, Staunton Island
Seen in Portland

Yankee
Spawn Locations:
Parked at the Portland Docks
Found in Saint Mark's, Portland

IMPORT/EXPORT CARS LIST: PORTLAND DOCKS CRANE

The Portland Docks also wants emergency vehicles to be collected.
Every vehicle (except the last one) delivered to the garage awards $1,500. Successfully completing the list gives a reward of $200,000.

Ambulance
Spawn Locations:
Found at Sweeney General Hospital, Portland View, Portland Island
Found at the Carson General Hospital, Rockford, Staunton Island
Found at the Hope Medical College, Pike Creekm Shoreside Vale

Barracks OL
Spawn Locations:
Spawns in roadblocks when the player has a 6-star wanted level

Enforcer
Spawn Locations:
Found in the backlot of the Staunton Island police HQs
Spawns when the player acquires a wanted level of four stars

FBI Car
Spawn Locations:
Spawns when obtaining a 5-star wanted level

Fire Truck
Spawn Locations:
Found at the Fire Stations in Harwood (Portland), Belleville Park (Staunton Island) and Francis International Aiport (Shoreside Vale)

Police Car
Spawn Locations:
Found at the Police Stations in Portland View (Portland Island), Torrington (Staunton Island), Pike Creek (Shoreside Vale)
Parked in the Francis International Airport, near the helipad

Rhino Tank
Spawn Locations:
Seen at Phil Cassidy's Army Surplus in Rockford after completing the mission "The Exchange"
Spawns when acquiring a wanted level of 6 stars.

IMPORT/EXPORT CARS LIST: SHORESIDE VALE GARAGE

A garage in Pike Creek, Shoreside Vale, wants a different set of vehicles to be collected.
Every vehicle delivered to the garage awards $1,000. Successfully completing the list gives a reward of $200,000. REQUIRED FOR 100%

Banshee
Spawn Locations:
Found in Staunton Island and Shoreside Vale
Found inside Capital Autos in Hartwood, Portland Island
Seen outside Asuka Kasen's apartment in Newport, Staunton Island
Found at Kenji's Casino in Torrington, Staunton Island
Seen in the parking lot west of the Wichita Gardens in Shoreside Vale

BF Injection
Spawn Locations:
Found at apartments near El Burro's telephone point in Hepburn Heights, Portland, after completing Sayonara Salvatore, between 18:00 and 00:00

Cabbie
Spawn Locations:
Parked at the Mean Street Taxis depot in Trenton, Portland Island
Found parked at the Multistory car park in Newport, Staunton Island

Cheetah
Spawn Locations:
Found at the Cartel Mansion in Cedar Grove, Shoreside Vale, Liberty City.
Seen at the Francis International Airport parking lot.

Esperanto
Spawn Locations:
Found parked by the Old School Hall in Chinatown, Portland
Seen at the AMCo. Gas Station in Harwood, Portland
Seen in the parking space by the Carson General Hospital in Rockford, Staunton Island

Idaho
Spawn Locations:
Found at the Supa Save! In Portland View, Portland
Seen at the Old School Hall in Chinatown, Portland
Seen in the parking lot near the Liberty City Stadium in Aspatria, Staunton Island
Found at Kenji's Casino in Torrington, Staunton Island
Seen around the Red Light District

Infernus
Spawn Locations:
Found on the streets in Staunton Island and Shoreside Vale
Found in the Francis International Airport parking lot near the entrance.
Found in the parking lot south of the Liberty City Memorial Stadium in Aspatria (after the mission "Grand Theft Auto")

Kuruma
Spawn Locations:
Found in traffic in Staunton Island and Shoreside Vale
Seen parked outside Head Radio Studio in Hepburn Heights, Portland Island
Found in the parking lot of Greasy Joe's Café, Callahan point, Portland Island
Seen parked in Portland Docks, Portland Island
Found at Momma's Restaurant in Saint Mark's, Portland Island
Found outside Capital Autos in Harwood, Portland Island
Seen at the Liberty Tree parking lot in Bedford Point, Staunton Island
Found in a car park near the apartments in Wichita Gardens, Shoreside Vale

Landstalker
Spawn Locations:
Seen driving around Staunton Island
Found outside a hut north-west of Belleville Park, Staunton Island
Seen parked in Cedar Grove, Shoreside Vale

Manana
Spawn Locations:
Found at the AMCo. Underground car park in Torrington, Staunton Island
Seen around the Red Light District
Found at the Francis International Airport car park in Shoreside Vale

Perennial
Spawn Locations:
Found inside the Parking Lot of Portland Harbour
Parked in an alley beside XXX Mags in Red Light District, Portland
Found across from the Police Department in Portland View
Seen outside Capital Autos

Sentinel
Spawn Locations:
Found at Marco's Bistro, in Saint Mark's, Portland
Parked at the Staunton Island Police HQ's parking lot
Found in Torrington, Staunton Island, outside Kenji's Casino
Found in the Francis International Airport Parking Lot

Stallion
Spawn Locations:
Seen inside a multistory parking lot in Newport
Found in Hepburn Height, near a TOYZ van
Found in Trenton, across the street from Joey's garage
Seen in the parking lot of the Carson General Hospital in Rockford
In the parking lot of the Liberty City Memorial Stadium
Found in a parking lot next to a cliff in Cedar Grove
Found in the parking lot of the Francis International Airport

Stinger
Spawn Locations:
Found driven around Staunton Island and Shoreside Vale
Seen parked in a car park in Bedford Point
Found parked by a mansion I Cedar Grove, Shoreside Vale

Stretch
Spawn Locations:
Can be found driving through Staunton Island and Shoreside Vale

Taxi
Spawn Locations:
Parked in an alley north-west from the entrance of Salvatore's Gentlemen's Club, Saint Mark's, Portland
Parked in the Newport Multistory Car Park, Newport, Staunton Island
Francis International Airport parking lot.
Full video below

Rampages

required for 100% completion
Rampage icons are marked with a white skull in a blue circle - there are 20 Rampages in total, 6 in Portland, 7 in Staunton Island, and 7 in Shoreside Vale. Rampages can be started at any point during the game, and each one has two different spawn locations, locations that alternate if failed.

It is strongly advised to complete the Rampages as soon as possible on each island. The more you progress through the story, the more gangs will become hostile to you, which will make it a lot harder to complete them.
Source for the Rampage map.
https://www.powerpyx.com/gta-3-definitive-edition-all-rampage-locations/


Unique Stunt Jumps
There are 20 Special Stunt Jump locations across Liberty City for the player to complete: eight in Portland, four on Staunton Island, and eight in Shoreside Vale.

RC Toyz Missions
The RC Toyz side-missions are a series of 4 side missions involving RC Bandit remotely controlled vehicles.

There are 100 Hidden Packages to be found scattered throughout Liberty City. Each 10 hidden packages collected offer the player unique rewards and weapons spawning outside of Claude's safehouses.


Full video below