The interior of island lairs usually contain large partially underground complexes where numerous activites are carried out. This is an incomplete list.
- Testing, production, packaging and storage of hard, exotic and experimental narcotics (such as the elusive Fentanyl).
- Testing, production and storage of experimental weapons such as railguns, plasma guns, laser guns, prototype rifles and missiles, etc.
- Holding political, clandestine and extremely dangerous prisoners (similar to Guantanamo Bay).
- Planning, preparing and coordinating clandestine missions across the globe, but especially in the Indo-Pacific Region.
- Training and housing mercenary troops, as well as preparing them for worldwide contracts.
- Experimenting with cutting-edge technologies such as nuclear reactors & weapons, digital electronics, metal alloys, jet engines, etc.
- Planning, preparing and coordinating paranormal reconnaissance missions deep within Oceanyka.
- Hosting private clubs for the rich and powerful, which sometimes may organise exotic parties.
- Carrying out esoteric rituals, which sometimes may have unexpected consequences.
- Safeguarding and experimenting on Precursor technology.
- Storing "human capital" for distribution abroad.