Isen IV was an airless, rocky asteroid, one of five moons of the proto–gas giant Isen in the Isen system of the Outer Rim. Its tunnels were inhabited by about 500 Humans and also by non-sapient morvak. It was the location of the Void Demons' pirate base.
- Star Wars: The Old Republic (First appearance)
- Planets of the Galaxy, Volume One (First mentioned)
- Galaxy Guide 9: Fragments from the Rim
- The Star Wars Planets Collection
- "Playing A Major Role"—Star Wars Galaxy Collector 1