: Eventually, Algae will run out. You must transition to an Electrolyzer , which breaks Water into Oxygen and Hydrogen.
: Start with Manual Generators. Transition to Coal Generators once you have researched "Smart Batteries" to prevent wasting fuel when batteries are full. 3. Critical Threats to Survival
: Build Outhouses immediately from the Plumbing menu. Unprocessed waste on the floor creates Polluted Water , which stresses "Dupes" (Duplicants) and spreads germs.
: Set up a Research Station near your power source. Researching "Basic Farming" and "Power Regulation" should be your first goals.
Sustainability in Oxygen Not Included is a cycle of resource conversion.
In the initial cycles, your priority is establishing basic life support to prevent early "colony collapse."