Persistent Damage in Space
Source GM Core pg. 86
Bleeding is especially dangerous in space due to a reduced volume of blood produced in space and spurting from lack of gravity. While in zero gravity, increase the DC of the flat check to see if a creature recovers from persistent bleeding to 17 (or 12 with appropriate help). While in a vacuum without environmental protections, increase the DC to 20 (or 15 with appropriate help).
Creatures become immune to persistent cold and fire damage while in a vacuum.
Creatures become immune to persistent cold and fire damage while in a vacuum.