The view of XCOM headquarters provides a complete overview of the base and its current facilities. As the project grows and new technology becomes available, you’ll need to construct new facilities to fulfill certain objectives and to advance the overall readiness of your troops. As space for new facilities becomes limited, it may be necessary to excavate further beneath the base. It should also be noted, certain facilities receive an adjacency bonus when placed next to another facility of the same type.
XCOM Enemy Unknown: Managing Facilities
From Orcz
