Adds loot bags: Wyld loot bag, Bacon bag, Common loot bag, Uncommon loot bag, Rare loot bag, Epic loot bag, Waffle loot bag and Legendary loot bag. You get them by killing mobs.

 

Although there are these types, the Shack Pack adds in common treasure, uncommon treasure and rare treasure which - unlike the loot bags - when you right click them spawn the loot without you having to look at them in a GUI menu.

 

 

Both of the mods that add these are completely unrelated.