Horizon Forbidden West

Exactly the same as the “Upgraded 3 Weapons” trophy, this, except that you have to do it for outfits as well. There are no differences whatsoever between upgrading a weapon and upgrading an outfit. Obviously each outfit will have different resources required to the weapons - and to one another, in fact.

I suspect you’ll get this one naturally anyway. If not, just upgrade the uncommon outfits, as the parts are easier to come by, than say upgrading a legendary outfit - some of the levels there require you to loot Thunderjaws and Tremortusks till the cows come home, and let me tell you, those badboys are not easy to farm!