Unlock the following cars by performing the corresponding tasks:

Bronze trophies
The Triple Double - Win all 3 medals on any Pro-Am Festival event.

Silver trophies
Half-way House - Earn 24 medals within the Pro-Am Festival.
Dedicated Stormer - Earn all 3 medals on each of the 16 Pro-Am Festival events.

Gold trophies
Pro-Am Champion - Set a time of 12:00 or less across all Pro-Am Festival events.

Bronze trophies
The Triple Triple - Win all 3 medals on any Carnival Festival event.

Silver trophies
Half Loaded - Earn 36 medals within the Carnival Festival.
Perfect Stormer - Earn all 3 medals on each of the 24 Carnival Festival events.

Gold trophies
Carnival Champion - Set a time of 17:00 or less across all Carnival Festival events.

Bronze trophies
Custom Collection - Customise each of the 8 vehicle classes within your Collection.
Ghost Busted - Beat a friend's ghost in a Race or Hot Lap event who currently sits above you in the leaderboards.
Playground Bully - Unlock all 4 areas of the Playground.
Round the Clock - Earn 24 medals within the Festival.
Seasoned Racer - Earn 48 medals within the Festival.
Storm Chaser - Complete a Festival event in each of the 4 MotorStorm locations.
Swish - Successfully leapt through the two red basketball hoops within the playground in one session.
The Triple - Win all 3 medals on any Festival event.

Silver trophies
As Good as New - Finish 1st, 2nd or 3rd in a Festival Race event without colliding into a competitor or barrier.
Eye of the Storm - Earn 96 medals within the Festival.
Let it Slide - Bank more than 2000 points in a single drift.
Playful - Played with all 8 vehicles within the playground in one visit.
Rare Reward - Unlocked 2 of the secret vehicles.
Silver Standard - Earn a minimum of 2 medals across all of the 64 Festival events.
Supercharged - Unlock the Super Car.
Wall Brawl - Beat 10 times after launching through the Pitwall.

Gold trophies
Apocalypse Champion - Set a time of 10:00 or less across all Apocalypse events.
Arctic Edge Champion - Set a time of 12:00 or less across all Arctic Edge events.
Pacific Rift Champion - Set a time of 10:00 or less across all Pacific Rift events.
Monument Valley Champion - Set a time of 10:00 or less across all Monument Valley events.
RC Champion - Set a time of 40:00 or less across the whole MotorStorm RC Festival.
Re-Scaling New Heights - Earn all 3 medals on each of the Festival's 64 events.
Wiped Out - Beat a time of 17 seconds on the event 'Wipe Out'.

Platinum trophy
Lunatics Unite - Earn all Bronze, Silver, and Gold trophies.