This may be an issue with steam, but I press “Play” and it will say “Dirty Bomb - Running” but then about 10 seconds or so later it stops saying that and the game didn’t launch. I have tried restarting steam and my computer, but I haven’t re-installed Dirty Bomb.
Thank you for reading or helping.
Right click Dirty Bomb in your library.
Then open the properties, go to local files and there you go.
Assuming that does not help you, I suggest you read through this guide here.
https://support-dirtybomb.nexon.net/hc/en-us/articles/208759216--Issues-launching-Dirty-Bomb-
It should fix your issue. 