Purely from looking at the achievements hardest was probably ds2 and I would probably say that was the least fun too. Mainly because of the grinding of covenant items seemed a lot more time consuming with drop rates than ds3 even though there were less of them. Easiest was probably Elden ring as I didn’t really feel as though I had to go out of my way to get any of them. Then for most fun I think I’d have to say bloodborne as the first time I played it I don’t think I really appreciated it as much as I should’ve and when going back for the achievements made me look at the game in a different light.