Today’s game is Oxygen not Included. I hate a long day today and wanted something simplish to relax. That’s this.
I usually don’t get to get very far in this because the after mentioned simpleness can sometimes backfire and actually make it fairly hard. But despite that this I usually have a great time in this game.

One of the first things I set out to do on this save was make a water pump. Easy enough. I hit a roadblock though where I need to dig for it due to the nearest thing of water being underground.
This resulted in the second issue: There’s no oxygen down there. That means my workers will have to make repeat trips down there to dig, build the ladder, and climb up.

Once I got that out of the way, I started on the second part of my go to plan for this game: Tunneling to the top of the map for Solar Panels.
Admittedly this is probably where all my playthroughs fall apart. As all my little guys end up dying before I get there. And I’m not sure how to make enough oxygen and food to keep them alive. I’ll get there soon one day. I’m determined.

Anyways. I just wanted to make a brief detour and break that I thought would be a nice break. I would have actually done Jedi Survivor but I was about to crash and fall asleep for the first time in a long while, so this is a much appreciated break.
Regarding the oxygen supply: I usually tunnel towards a colder area and build a self-powering oxygen machine there. It’s basically a room with electroylzers and gas pumps at the top and bottom (or a gas filter) to separate the oxygen and hydrogen. The hydrogen then goes to hydrogen generators, the oxygen is pumped into the base. Another important bit is to make sure the CO2 has a place to go (downward) before you can deal with it.
That’s basically the system I end up setting up. I think my main issue is I always run out of space for the CO2. I’ll move it downwards next time and try that. Maybe I’ll have better luck that way
SPOMs are pretty overkill for somebody at the point where OP is on the learning curve, though.