DiRT Showdown
49 Achievements
1,000
25-30h
Showdown Showroom
You own all vehicles
20
How to unlock the Showdown Showroom achievement in DiRT Showdown - Definitive Guide
Here is a link to Codemasters Racenet official website so you can track your car buying process by click DiRT Showdown at the bottom then selecting Tour Progress then vehicles will bring up all the vehicles and which ones you have and have not brought.
https://racenet.codemasters.com/showdown/career/carviewer
If you don't want to make an Codemasters Racenet account you can track how many you have brought by going:
Main Menu>Extras>Statistics then scroll down a little (Its just before the Career Summary)
**Thanks to Unit215 for pointing out that you can afford to buy all cars by the end of the tour but you will need to play online if you wnt to fully upgrade every vehicle**
Race
. Beliveau Meteor
. Duke Coupe
. Dumont Type 47
. Jackson Adventure
. Janzen Modified
. Jupiter San Marino
. Larock Sprinter
. Logan Vulture
. Lombardi 336LM
. Zenden Cup
Hooligan
.Ford Escort MKII
.Ford Fiesta Gymkhana 3
.Ford Fiesta H.F.H.V
.Ford Mustang GT
.Mini Cooper S Gymkhana
.Mitsubishi Lancer Evo X
.Saturn Sky
.Scion TC
.Subaru Impreza WRX STI GD
.Subaru Impreza WRX STI GR
Demolition
.Burton Beachcomber
. Coyote Landraider
. DMG Titan
.Holbrook Growler
.Jupiter Del Rio
.Kessler Stowaway
.Kohler G350
.Lafayette Eulogy
.Onyx Runner
.Robson Avenger
I havent been online racing yet, and I got it.
You can buy a new vehicle when you start a race. When you are in the car select menu scroll all the way to the right to find cars for purchase. Note that there's not always a new car to purchase though as you have to unlock new cars by completing events first.
Note: There have been reports of people not getting this trophy even though they've bought all the cars in the game. The only known solution to this issue as of now is to delete your game/save data and play through the whole Showdown Tour again. I advise to make a backup of your save file before you buy you're 30th car.
You can buy and new vehicle when you enter an event and are asked to select your car. Some vehicles have to be unlocked in the showdown tour before being able to buy.
Money is earned in the Showdown Tour, Multiplayer for obtaining a new Level and $1000 is given for winning a Challenge