Introduction
Every backpack has the option to set an unlock challenge. Unlock challenges are simply goals the player can complete in order to unlock new backpacks. They are inspired from Advancements from the vanilla game, except the main difference is that the player unlocks a reward (the backpack).
Unlock challenges are persistent per save/server, they do not transfer to different saves/servers, just like Advancements. Partial completion of unlock challenges is also saved. This means that if the player has to cut down one-hundred oak logs, and they have only cut fifty, the unlock challenge will remember fifty oak logs have already been cut.
Backpacked comes equipped with the freedom to customise unlock challenge using one of the many available challenge types. All chellenge types have been designed to be highly customisable, allowing you to be creative as you want with your challenges. Kill ten zombies while holding a potato, you can do that! Travel one thousand blocks while driving a boat on land, sure, you can do that too!