Confusion

Ive been gone from the Wii U hacking seen for SOOOO long. But I am coming back to play breath of the wild. But I am forgetting what platform I used to use to load my games. I used to go to the browser and then install games to my Wii U hardrive from a file I downloaded. I cant remember if was loadiine or something like that. I never installed a CFW so I remember I couldnt do DLC. Can someone remind me? Now I want to find Breath of the Wild online but I sort of forgot like what I need. I feel like it wasnt an ISO. I remember downloading some computer thing which downloads it from the eshop and unlocks it? Im so confused

I found a file. I would use WUP installer to install games