After looking at the way I build, I'd say parasite.
My single player base started as a double door built into a cliff at the back of a cove. Now there is no cove. Just a fortress. Also a pit to the bottom of the map...with a glass roof over it, which doubles as a floor for my fortress.
My single player base started as a double door built into a cliff at the back of a cove. Now there is no cove. Just a fortress. Also a pit to the bottom of the map...with a glass roof over it, which doubles as a floor for my fortress.