PYROS - "Hell-pit". Pyros is a world of a million volcanoes. Surface is very dangerous and cities are built in protected domes or underground. Despite all precautions, natural disasters are frequent and Pyros remains the most unpopulated planet to this day.
Some areas of this world are considered a smugglers paradise, but reluctance of any territorial faction to unleash a major military operation offered criminal syndicates a chance to properly entrench themselves for a long period.
The least populated planet in Starpoint Gemini 2, because of a surface that is covered by volcanoes (millions) mankind is forced to live under the surface or use domes for shelter against the volcanoes and other natural catastrophes.