Main article: Planet

Consisting of Lava and Barren Planets, can only be colonised by researching the appropriate tier 4 technologies. These planets are even less desirable (-15 ) than Class III Planets to inhabit due mainly to the fact that Food is nonexistent as are opportunities for Science . The only saving grace is that the opportunites for Industry or Dust are actually very good. Class IV Planets can be terraformed from other Class IV or Class III Planets by researching the appropriate tier 5 technologies.

Lava

"'Tectonically active and hot, advanced science is necessary to colonize this planet."

Lava Planets provide very good opportunities for Industry , However, Science is nonexistent and there are poor opportunities for Dust . They can to be Tiny (14.3%), Small (19.0%), or Medium (19.0%) in size, but are usually Large (23.8%) or Huge (23.8%). Lava Planets can be created from Class III or other Class IV Planets through terraformation by researching the tier 5 Graviton Manipulation technology on the Exploration & Expansion Technology Tree.

Barren

"Lacking both water and atmosphere, exploitation of this planet type is very difficult."

Barren Planets provide very good opportunities for Dust , However, Science is nonexistent and there are poor opportunities for Industry . Like Lava Planets, they can to be Tiny (14.3%), Small (19.0%), or Medium (19.0%) in size, but are usually Large (23.8%) or Huge (23.8%). Barren Planets can be created from Class III or other Class IV Planets through terraformation by researching the tier 5 Atmospheric Engineering technology on the Exploration & Expansion Technology Tree.