The Complete 2026 Mid-Game Engineering Guide of Oxygen Not Included
This Oxygen Not Included Guide provides a straightforward build order to Enter the Mid Game Smoothly, which consists of a SPOM, atmo suits, permanent cooling loop and metal refinery setup.
Following this guide, you will first setup a stable food and oxygen income in the early game, explore to find thimble reed and gold for atmo suits, reach the oil biome safely.
Then the guide provides a practical workaround for early metal refinery usage to boost your progress.
We can then build a SPOM, which stands for self powering oxygen machine and it would be a permanent setup to provide oxygen and excess power to the colony.
Afterwards, we can switch to a permanent metal refinery setup which recycles the heat from smelting metal with a steam turbine and convert to power. Smelting Steel would become power positive!
Finally, we can build the steam turbine and aquatuner combo, or ATST, which is a permanent cooling loop.
After all of these builds are completed, we are close to a completely sustainable base, all you have to do is to reach out for geysers that produces enough to support your duplicants. Tips for finding Geysers are included.
00:00 Intro/Setting
00:40 Guide Starts / Essential Early Game Setup
10:20 How to Explore and Prepare for Mid Game
22:40 How to use Metal Refinery Safely in the Early Game
24:38 How to Build the SPOM
28:20 How to Setup Atmo suits and Safely Explore the Planet Core
33:30 An Easy and Efficient Radiation Research Setup
38:10 Oil Refinery Setup to Produce Petroleum
39:20 How to Use the Polymer Press for Plastic
40:10 How to build a Permanent Metal Refinery Setup
44:10 IMPORTANT: The Correct Liquid Types to use as Refinery/Aquatuner Coolant
47:30 How to build a Permanent Cooling Loop with Steam Turbine and Aquatuner
49:58 Where and What should we apply the Cooling to?
52:29 How much Power would these Mid Game Modules cost?
54:20 What to do After building these mid game modules?
55:10 Tips to Find Useful Geysers
58:02 Please Don't build an Industrial Sauna....
58:47 How to progress your colony smoothly: The summary
59:35 Save Files Included If you want to try the same map...
The Savefile for this colony if you want to try:
https://drive.google.com/file/d/1KnN9...
The Seed is V-SNDST-C-268919062-0-0-0
Join my Discord for general ONI discussion:
/ discord
#oxygennotincluded #midgame #guide #cooling #spom #steel #plastic #steamturbine #aquatuner #sustainable