Mastery 100!
It took 33 campaigns.
A small celebratory video :
I already said it in the Safehouse Thread (with illustrations) : I have 4 challenges left (GOAT, Employee of the Year, Slow But Steady, and Top Dog). All have clear empty emplacements on the central shelves.
But the shelves on the Bedroom wall still have one empty emplacement. And so is the entirety of the top shelve in the Office.
All of those in addition to the 4 empty syndicate type trophies in the basement.
So clearly, more is yet to come.