I can't delete an application (Dota 2), but I need to create storage space

Hello all,

I'm hoping for some help.

I have tried Steam game dota 2, but it didn't impress me and I would like to delete it from my Mac as it is taking about 23 GB of my storage space. I did everything what I normally do with deleting apps and at first it looked like it worked, app is gone also Steam is uninstalled or deleted correctly, only place where the "Dota 2" seems to be showing is in "my about this mac/storage/manage/applications", but anything i try to delete it doesn't work, any tips how to finally get rid of this, is there something possible to do?