This mod changes the skill tree background images with the Bad Guys.
Mr. Wolf - Mastermind
Mr. Shark - Enforcer
Mr. Snake - Technician
Ms. Tarantula - Ghost
Mr. Piranha - Fugitive
Side note: When I watched the Bad Guys a year ago, I thought that each member of the gang represent each skill tree in Payday 2.
Another side note: Excuse my amateur image position, it's my first time doing this.