High Pressure Atmosphere
- While the definitions of a high pressure and a dense atmosphere overlap, there can be considerable differences as well.
High Pressure Atmospheres are classified as possessing 2.5 standard atmospheres or more of pressure.
History & Background (Dossier)
Worlds with high pressure atmospheres are likely to be teeming with flying creatures, and while most will be equipped with wings, others might be gas balloons, or may be gliders, or 'kites'. An aerial ecology really thrives when a very small planet (with low gravity) has a dense atmosphere.
- Dense atmospheres also retain a lot of heat resulting in a great deal of highly energetic weather; imagine gargantuan, continent-spanning hurricanes, powerful electrical storms, supersonic winds and football-sized hailstones! Take a weather phenomenon and max it out! 
- And yet while very impressive, these densely atmosphered worlds don’t come even close weather-wise to the unimaginably energetic and destructive storms of a Storm World.