Which Challenges Unlock 100% Game Completion?

So I´m at 96% and I have 100% Hell overthrown. Completed all the areas, collected all the audio tracks/commentaries, glyphs and Drive Thrus. I have all 7 deadly sin weapons, bought every upgrade, completed every main quest, completed all activities so now there´s only annoying challenges left. The same is with SR IV, I want to know which specific challenges I have to complete to achieve 100% game completion. Is it absolutely ALL the challenges, or is it only some of them and in that case which??!