Looting
Looting is a Research category dealing with backpacks and junk inside the vault. The scaling cost for this category is 2 additional knowledge points for each unlocked research in the category.
Backpack Size Upgrades
Double Pouches and Belts cost 1 knowledge point each to unlock. Small Backpacks costs 2 knowledge points to unlock. Big Backpacks costs 3 knowledge points.
Stack Upgrades
Stack Upgrades unlocks upgrades for backpacks. These multiply the amount of items that can be stored in each slot. The smallest upgrade increases the stack size by 2 times from 64 items to 128, and the largest increases the stack size by 16 times from 16 items to 1024. Multiple stack upgrades stack multiplicatively; two tier two upgrades, which multiply stack size by 4 times each, would increase the stack size by 16 times. This can lead to a single slot being able to hold millions or more of a single item.
Stack Upgrades costs 1 knowledge point to unlock.
Auto Refill
Auto Refill unlocks the Refill and Advanced Refill upgrades for backpacks. These will refill slots in your hotbar with the selected item in the upgrade's filter from the backpack. The advanced upgrade allows you to define the specific slots you wish to refill as well as having a larger filter for more selections.
Auto Refill costs 1 knowledge point to unlock.
Auto Feeding
Auto Feeding unlocks the Feeding and Advanced Feeding upgrades. These can be configured to automatically feed the player food from the backpack, with the advanced upgrade allowing more specific situational filtering.
Auto Feeding costs 1 knowledge point to unlock.
Junk Management
Junk Management unlocks the Junk Controller, the Junk Identifier, and the Vault Junk Upgrades tiers 1-4. These allow the player to define a list of blocks that will automatically be voided upon pickup in vaults. This does not affect the Overworld, the Nether, or the End. The Junk Controller allows the player to shift click blocks in their inventory into its memory. This memory is limited in size, though it can be upgraded by using the Vault Junk Upgrades in order. Multiple Players may use the same Junk Controller, but the memory and the upgrades used to increase its size are unique to each player.
Junk Management costs 2 knowledge points to unlock.
Soul Harvester
See Soul Shards.
A faster Soul Diffuser that can pull from an inventory above and push to an inventory below.
Soul Harvester costs 2 knowledge points to unlock.