Summary: The Gorge creates these chambers to serve many purposes. Some enable new evolutions, while others serve tactical, defensive, or resource gathering purposes. Each hive allows for one kind of evolution chamber. Resource chambers and offensive chambers have no hive requirements.

Each of these chambers serve a purpose in the field, but defensive, movement, and sensory chambers play another important role. They act as supplements to the knowledge contained in hives, allowing the Kharaa to specialize themselves even further with entirely new abilities. Each hive can support one kind of upgrade chamber – though which type of chamber is chosen first, second, and third has varied from battle to battle. See the evolutions section for descriptions of these powerful biological upgrades.