Zim's Undergroundbase[1] is a location that belongs to Zim. In 5 Years Later, it's used by The Alliance.
Notable locations[]
The House[]
The house was built on top of the underground laboratory to make Zim better blend in with human society. It also is guarded by robotic gnomes.
The Laboratory[]
The laboratory is where Invader Zim creates his diabolical plans to enslave the human race and conquer the Earth for his Almighty Tallest.
Before Chapter 4: The Fallen Gods, the base was taken over by The Alliance and now they have used it's advanced Irken Technology to create Eon's Machine; the Godmaker.