Well... there IS oxygen to start with. however if you don't make an oxygen generator, THEN there is no oxygen. OR if you make big mistake, THEN things can go chaotic very fast. OR you could dig into an area with deadly gases or high or low temperatures or fluids of death without proper gear, THEN the tables could be flipped. Yes, I like the game. It can get interesting sometimes, or chaotic or doomsday and all your duplicates die. The downside is that the power cables overload to easily... even in sandbox, i use a lot of stuff that consumes a lot of energy. i wish you could change the setting to how much a power cable could take. Oh well, they don't have it, and that is ok. because that means more micro managing Otherwise, this game is very fun. =]
Also. for first time players that don't know what they are doing, you can look up tutorials of any kind. i think there are plenty who know more of what they are doing than i do... Or you can keep reading, i can give a starting tutorial... sorta.
Once you first start your game, you may want to do the first rock that pops up. (For first timers, or you can go adventurous and do like the hardest rock there is.) There will be a seed generator that you can randomize to the desired seed. however if you do the first rock, you do not need to worry about that. and then if you go into game settings you will find some settings that regard duplicates, for first timers, it is recommend that you set the duplicates food settings to fasting, or if you want the easiest, do bottomless stomach. for duplicates durability, you might want to set it to indestructible if you don't want to have to worry about making more suits. then it is recommended to set duplicate morale to to the lowest setting. (Because it takes forever already) And the duplicates stress gain, it is recommended to set it to cloud nine. and you might want to disable duplicate stress so that when disaster strikes, you do not want to worry what your duplicates will do when fully stressed. and if you want to be creative, check the box for sandbox. then once you are ready, you can press embark. then you can select your duplicates, what i do is have a digger and a builder and a researcher and randomize them so that their abilities are around 10 or greater. there might be better methods, but this is what i select. once you name your colony you are ready to go. once you enter, one of the first things you should do is build an outhouse. and start digging on either side and dig up algae and dirt and metal and find a water source. and you should make a power source and make a micro-compressor (For food) Dirt and water are your ingredients for mush bars (EW! I would not want to eat that either! But you gotta eat something before you can make lice bars which is also gross!) and you should make an oxygen generator that consumes algae. after all that you should consider making beds for your poor duplicates. I guess that is it for now... however, a word of advice... DO NOT USE THE POLLUTED WATER FILTER AND PUMP IT INTO YOUR MAIN WATER SYSTEM! IF YOU DO, YOUR WATER SYSTEM WILL GET FOOD POISONING GERM! AND I DO NOT KNOW HOW TO FIX THAT! SO IF YOU ARE GOING TO USE THE POLLUTED WATER FILTER USE IT FOR THE TOILETS AND NOT THE SINKS AND THE WATER FOR YOUR MUSH BARS! (Still gross) I found that out the hard way... Be careful.
Overall i recommend 10/10!
Goody!