I have found all Kingslayer Files and Artifacts with the exception of ONE (1) in Inca Camina and ONE (1) in Media Luna.
It was extremely difficult to get to this point as only about 50-60% of the files show up initially. Others are unlocked through finding other files or artifacts and still others are found through exploring 'Unexplored' question mark areas where the files finally show up or other question mark areas that show up after you explore larger question mark areas. I already understand that just because Inca Camina says a file still exists, it does not mean that the file is in that area. Files from all of the areas or bosses were found all over the map not necessarily in the area or under the boss they are allocated to.
That being said - I've combed the map at the most in depth range and I cannot locate the files missing (two) from Inca Camina and Media Luna.
Any idea Ubisoft? Anyone else find ALL files and artifacts at this point?
Sometimes The File Can Be A Video.
The Only Thing I don't Have in Media Luna is The Briefing Video.
Which Makes Me Think The Achievement is Somehow Tied to the Upcoming Unidad Conspiracy DLC.
Worth Noting.
I Had Another Province Where I Was Missing 1 Seemingly Impossible to Locate File,
So Had The Theory To Replay The Boss Mission and Play The Briefing Video When Prompted.
Sure Enough, Got The Last File, It Was A Video.