Have a recyclable source of oxygen.
Method: Through air conditioning condensation, contaminated oxygen can be condensed into a liquid state, or even low temperature oxygen can be directly transformed into a solid state. Liquid oxygen is pumped through the water pump, and oxygen and low temperature can be directly supplied.
Extended Games:
"Oxygen Hypoxia" is a simulation game produced and published by Klei Entertainment, which developed "Don't Starve". Its art style is also in the same vein as "Don't Starve", and it also uses a horizontal 2D layout.
This is a space colony simulation game in which players must manage your residents and help them dig, build and maintain an underground asteroid base. You need water, food, oxygen, well-regulated pressure and the right temperature to keep them alive and satisfied.
In "Oxygen Deficiency", resources are a very important thing.