To unlock motorcycles, aka "bikes", you have to find and enter every single car show/dealership (NOT the Car rental places though). Once you have done this, all bike dealerships will be open. Alternativly, to get a bike without unlocking the dealerships, just simply go to your house, and buy one over Xbox Live form another player.

Submitted By: M Smiley

Unlockables

Alfa Romeo 8c Competizione: Get gold cup in "Tour of the Island" single-player challenge
Chrysler Firepower Concept Car: Get gold cup in every TRANSPORTER extra challenge
Chrysler ME FOUR TWELVE: Get gold cup in every RACE solo challenge
Ford Mustang GT-R Concept: Get gold cup in every CONVOY extra challenge
Ford Shelby Cobra Concept: Get gold cup in every TOP-MODEL extra challenge
Ford Shelby GR-1 Concept: Get gold cup in every SPEED solo challenge
Volkswagen W12 Coupe: Get gold cup in every TIME solo challenge
Volkswagen W12 Roadster: Get gold cup in every HITCH-HIKER extra challenge

Submitted By: Atari

Achievements

Single Player Vic. - Level 1 (20) - Win the Gold cup in 5 Single Player challenges.
Single Player Vic. - Level 2 (20) - Win the Gold cup in 10 Single Player challenges.
Single Player Vic. - Level 3 (20) - Win the Gold cup in 20 Single Player challenges.
Single Player Vic. - Level 4 (30) - Win the Gold cup in 40 Single Player challenges.
Single Player Vic. - Level 5 (40) - Win the Gold cup in 60 Single Player challenges.
Single Player Vic. - Level 6 (60) - Win the Gold cup in all the Single Player challenges.
Single Player Time Challenges (15) - Win the Gold cup in all the Single Player Time challenges.
Single Player Race Challenges (20) - Win the Gold cup in ALL the Single Player Races challenges.
Single Player Speed Challenges (10) - Win the Gold cup in ALL the Single Player Speed challenges.
Island Tour (10) - Win the Gold cup in the Island Tour challenge.
Multiplayer Vic. Level 1 (10) - Win 3 multiplayer Ranked Races.
Multiplayer Vic. Level 2 (20) - Win 15 multiplayer Ranked Races.
Multiplayer Vic. Level 3 (35) - Win 30 multiplayer Ranked Races.
Multiplayer Vic. Level 4 (60) - Complete all the missions: Top-Model, Hitchhiker, Vehicle Transport or Courier
Instant Challenge Victories (10) - Win 5 matches in Instant Challenge
Sharing Custom Challenges (10) - In the Drive In, share 3 custom challenges
Custom Challenge Victories (10) - Win 2 matches in the custom challenge Drive In
Club Member (10) - Be a member in a Club
Club Race Victories (10) - Win 3 matches in Inter-Club Races
Trade (10) - Buy or sell a car to a member in Trade
Ferrari Collector (20) - Have 3 different Ferraris
Lamborghini Collector (20) - Have 3 different Lamborghini
Mercedes-Benz Collector (15) - Have 3 different Mercedes-Benz
Chevrolet Collector (10) - Have 3 different Chevrolet
Aston Martin Collector (15) - Have 3 different Aston Martin
Ford Collector (10) - Have 3 different Ford
Bike Collector (10) - Have 3 different bikes
Ben Sherman Collector (10) - Have 10 different Ben Sherman Gear
Ecko unltd. Collector (10) - Have 10 different *ecko unltd. Gear
Tuner (10) - In the Tuning Shop, buy a performance pack for your car
Explorer (40) - Explore every road on Oahu
Easygoing Tourist (10) - Drive 30 miles
Steadfast Tourist (25) - Drive 200 miles
Traveller (30) - Drive 400 miles
Seasoned Traveller (35) - Drive 1000 miles
Eagle-Eyed Driver (40) - Drive 5,000 miles
Owner (20) - Have 2 houses
Real-Estate Tycoon (30) - Have 15 houses
Small Collector (15) - Have 2 different cars
Amateur Collector (20) - Have 4 differet cars
Confirmed Collector (25) - Have 10 different cars
Most Varied Collector (30) - Have 20 different cars
Extreme Collector (30) - Have 50 different cars

Unlockables

Editor Mode - Get Pro status.
Photo mode - Get to Amateur level.
The Reward - Get to Expert level (180 achievement pts.)
May the Best Man Win - Get to Champion level (450 achievement pts.)
The Legendary Record - Get to Champion level (450 achievement pts.)
Bike Showrooms - Go to all showrooms on the island.
Chronopack - Purchase two vehicles.

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