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