I'm not positive, but I believe that's why Keen supports mods and gave us the Scenario Editor. Those are the things that give a sandbox game life. If you've seen or played Escape From Mars you've witnessed Keen's storycrafting skill. What you're looking for requires talent Keen has not hired because if they don't have a working game none of that other stuff will help it. My experience (up until this moment because I haven't loaded the game yet today) has been that in creative if there is an oxygen generator somewhere in the loop the tanks will deplete but the generators will produce enough to keep the thrusters working, apparently even without a source of ice. Just as your batteries never go dead, oxygen generators will always produce oxygen and hydrogen. @Commander Rotal , a lot of bragging in this update. I'm thinking of loading up Chilkoot Trail today. How's the Tapping doing?