I beat Dirt Showdown today by finish the last race.
This game is more disappointed than usually to be fun because single player/free race/time trial are missing so you only stick with career and joyride.
I'm not impressed with joyride and they are just play the trick like drift, smash, donut, air, etc.
This game is very buggy on Directx 11 so I have to play in Directx 9 so Codemasters never fix any bugs with Directx 11 since Dirt 2 released in 2009, however I still have some bugs, especially game closed for no reason.
If you want play game without any bugs so I recommended you to get console version because I doubt about Codemasters will fix to make completely bug free.
For Steam users, you can see achievements under my Steam profiles.
In Moto We Trust