Races

Atmospheric Compatibility

Atmosphere Types	Oxygen	Ammonia	Bromine	Carbon	Chlorine	Fluorine	Sulfur
Geroo
Lio
Mysa
Rakuto
Ringel
Umbran
Ulayavi
Coosa
Geordian
Meeri
Anup
Montrose
Ssarith
Arrunian
Kyacaotl
Tryonn
Turek
Hekiru
Krakun
Native/Compatible – Does not necessarily mean NO issues, but issues tend to be minor (low/excessive saturation, atmospheric pressure differences, etc)
Temporarily Survivable – Cannot breathe fully, but will not choke instantly; can survive anywhere between minutes and hours. Eye and open wound contact with atmosphere is a non-issue.
Non-Breathable, Full Contact Okay – Rebreather only is fine, contact with the atmosphere is not (too) dangerous for long periods of time. Eye contact and open wounds won’t cause too much issue
Non-Breathable, Skin Contact Okay – Full face mask required at minimum, can cause serious issues on contact with eyes, open wounds
Contact Dangerous – Must wear full environment suit, skin contact will immediately or very quickly become an issue

Notes on atmospheric compatibility

For purposes of simplicity, atmospheres settle into a number of "types". While these types are not precisely exact, they are close enough to allow some species to share atmospheres. Most atmospheres have a mixture of oxygen and inert gas (usually nitrogen) in their chemistry. The listed chemical or element is not the raw elemental chemical--it is just the basis by which the rest of the atmosphere is built. For instance, while elemental chlorine is very dangerous for all sorts of reasons, atmospheric chlorine is more-or-less like an overzealous pool cleaner.

Also note these divisions are not the full story. For instance, while sulfuric atmosphere contact is bad for most species, geroo experience it worse than others--while other species will experience burns and hair loss after prolonged contact, geroo will experience this almost immediately. Similarly, while most species can "breathe" oxygen atmospheres for a few minutes, krakun can survive in these atmospheres for multiple hours.

Atmospheres are not the only issue, either. Water from these respective environments are different--the tryonn, being a largely water-based species, also will have similar issues with breathing the water of other atmospheres. For the most part, water from non-compatible atmospheres is poisoned, either minorly or majorly, and would need to be "purified" to be drinkable for species from other atmospheres.

Surgery is utilised to overcome limited atmospheric issues. While there is no specified limit, canon surgery workarounds exist up to the 'Non-Breathable, Full Contact Okay' category for logical reasons of contact issues. Genetic modification technology is not enough to make another species compatible, except explicitly for the sourang, which is intended to be the exception and not the norm. Read the species to learn more. Surgery has so far included preventative to mitigate exposure for 'Non-Breathable, Full Contact Okay', and supplementing for 'Temporarily Survivable' atmosphere, where the atmosphere lacks the required compounds for survival.

Food is another matter entirely. Some amino acids are universal. Some foods, like javea, can be shared across multiple species, but a good bulk of foods are specific for individual species. It is possible to find krakun food that is edible for geroo, but the more incompatible the atmospheres, the rarer the potential food sources get.

• Some atmosphere types proposed but not used yet: Methane, Phosphorous