^^ yep, it's a... challenge; and not for the faint-hearted. Bottomline: if you have no idea how to interpret/work_with offsets and browse through a datastructure, you're kinda lost. I'm just giving 1 example here, as starting point (and it was the 1st one in my list, that still needed completion).
If you double-click the 'Address', you should now that the list of Challenges start at [pChallenge+50]. Its value you'll find 2 offsets below from there. What that particular challenge is, you'll need to compare with what you see onscreen (value-wise). (logically: try this when just starting the game, as most of them will not be set 'completed')
(ps: I'm sure there is a string_ptr flying around there, telling us exactly which challenge it is; but I lack the experience to figure this one out ~ it's on my Todo list, ok
pm me if you want to give it a swirl...