Item

An item is any object in the game world which can be added to a player character's inventory (or any other inventory, for that matter – including those belonging to NPCs and containers).

Items can often be traded with merchants, found as loot, created via crafting, acquired by completing quests, or collected in the game world.

Some items, such as currency, are commodities. Other special cases include plot items.

TODO: what distinguishes an item from an acquired ability? Perhaps the fact that items can be (at least theoretically) removed from the player character?