Oxygen.not.included.v544793-p2p.iso (Must See)

Prioritize "Basic Farming" and "Power Regulation." This unlocks the Planter Box and larger batteries.

Refine Copper to build an Atmo Suit Dock at your base exit. This allows Duplicants to explore high-heat or gas-filled biomes safely. 4. Expansion: Exploring Biomes Not Quite Beginner's Guide - Steam Community Oxygen.Not.Included.v544793-P2P.iso

Your immediate priority is ensuring your Duplicants don't perish within the first few days. Prioritize "Basic Farming" and "Power Regulation

Upgrade to Flush Toilets and Sinks. This requires a Water Sieve to clean polluted water, creating a closed-loop system. This requires a Water Sieve to clean polluted

Start a Mealwood farm. It is the most reliable early-game food source and requires minimal resources (just Dirt).

Build an Oxygen Diffuser . It consumes Algae to pump breathable oxygen into your base.

Build an outhouse and a wash basin immediately. This prevents "accidents" that contaminate your base with germs.