Project CARS 2
47 Achievements
1,000
40-50h
Diversity
Completed a Championship in every Motorsport discipline within Career
30
0.62%
How to unlock the Diversity achievement in Project CARS 2 - Definitive Guide
Tier 6 - Ginetta
Tier 5 - Clio Cup
Tier 4 - RX Lites Regional
Tier 3 - Renault RS01
Tier 2 - SCR World
Tier 1 - IndyCar
I did try and fail a few different other series' including Kart One and Formula Rookie. These may be part of the requirement because they were "completed" but not successful.
As seen in the picture below there are 5 different disciplines in career mode. Open-wheels, Prototypes, GT, Touring and Rallycross. You will have to win one championship in each discipline to earn this trophy. Ginetta Juniors count for the GT discipline so if you start with this one you can have the trophy when finishing Tier 2.
If for some reason you don't have the trophy when you reach Tier 1, don't worry as all the championships will be unlocked after winning a Tier 1 championship. You'll have to earn 2 different championships in Tier 1 for another trophy anyway so make sure to not always stay in the same discipline and you should obtain this trophy naturally.
You could for example choose, Ginetta Juniors (Tier 6) -> Clio Cup (Tier 5) -> RallyCross (Tier 4) -> LMP3 (Tier 3) -> Formula X (Tier 2).
For example:
Open wheel racing (Formula Rookie (category 6))
Touring car racing (Renault UK Clio Cup (category 5))
Rally Cross (RX Lites Regional (4 category))
Prototypes (LMP3 (category 3))
GT class (GT3 (category 2))