After the core of a Class F planet is sufficiently cool, volcanic activity lessens and the planet is considered Class G. Oxygen and nitrogen are present in some abundance in the atmosphere, giving rise to increasingly complex organisms such as primitive vegetation like algae, and animals similar to sponges and jellyfish. As thesurface cools, a Class G planet can evolve into a Class H, K, L, M, N, O, or P class world.
- Farms produce only 50% Food output unless in pressure dome or hydroponic farm.
- Limited Water - No Fishery or Waterport, but Naval Units can operate here at 50% effectiveness.
- Facilities will suffer minor damage unless in pressure domes.
- Combat units will suffer minor attrition due to above normal heat and restrictive atmosphere.