Inventory

The player's inventory is very different from vanilla. The number of slots is initially much smaller. The inventory crafting grid is 3x2 slots. There are two additional special equipment slots, yoke and backpack. These slots allow items which can increase the number of available inventory slots. The offhand slot also has a more specific function for carrying large items which can't be held in any other slots.

Main inventory slots
Initially, only one row of inventory slots is available (the hotbar). More slots become available by using special items, up to a maximum of four rows total (equivalent to vanilla).

Equipment Slots
The contents of these special equipment slots also affect the player's movement speed.

Backpack and yoke
These equipment slots each accept only their special item. Equipping a backpack adds one extra row to the inventory. Equipping a yoke adds two extra rows to the inventory. These effects are cumulative, i.e. equipping both a backpack and a yoke will provide extra inventory rows.

Offhand
The offhand slot accepts any item. However, some heavy or bulky items can only be carried in the offhand slot, meaning only one such item can be carried at a time.

Crafting grid
The crafting grid is 3 columns by 2 rows. The recipes available in the inventory are completely different to vanilla.