The title is pretty self explanatory I guess...

Posters  stolen  taken from here : https://imgur.com/a/SXGGz

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Apparently Overkill thought it was a good idea to remove the skill tree background...

Well,this mod can fix that bad decision.(Thanks to Yokuu!  for this <3)

Also I added Richard at the Mastermind Skill tree ,as suggested by someone in the comments