I finished Just Cause 3 last week. I completed the story, and liberated all the bases, before flying around collecting all the collectibles. The only thing I have left to do is a lot of the challenges, but I can't see me ever being arsed to do those, since most of them are rock hard. So essentially I have 100% this as much as I ever will.
Games competed in 2016:
Just Cause 3
(Forgive me for not spoilering that, but I'm on my phone, and it doesn't support spoiler tags. You'll just have to deal with my long list of completed games running off the bottom of the page and ruining your 56k internet limit.)