In the space-colony simulation game Oxygen Not Included you’ll find that scarcities of oxygen, warmth and sustenance are constant threats to your colony's survival. Guide colonists through the perils of subterranean asteroid living and watch as their population grows until they're not simply surviving, but thriving...

Deep inside an alien space rock, your industrious Duplicant crew will need to master science, overcome strange new lifeforms, and harness incredible space tech to survive, and possibly, thrive.

You'll need water, warmth, food, and oxygen to keep them alive, and even more than that to keep them happy.

It's May 18th and that means it's time for the official Steam Early Access release of Oxygen Not Included!

The Early Access of Oxygen Not Included is now available on Steam for $24.99. Players who own an existing Klei game on Steam will receive a 20% loyalty discount when buying the game, and if you bought the Oxygen Not Included Alpha, you won't have to buy it at all! You already own it.

The included Agricultural Upgrade has focused mainly on the introduction of new farming systems, making them more complex and rewarding. These changes should require you to be more attentive to your crops and expend more resources in order to raise them, but ultimately allow you to reap the most benefit from their harvests.

Key Features:

• Everything in your space colony is under your control, from excavation and resource allocation right down to plumbing and power systems. Resources will begin depleting with your first breath, however, so be sure to dig fast if you want to live.
• Keep the psychological impact of survival at bay with fun leisure activities, great accommodations and even better food for your colony. Duplicants each have different and potentially destructive ways of reacting to stress, so be sure to always keep them happy. Whatever the cost.
• Create interlocking pipe systems to swiftly deliver fuel and liquid to critical areas of your base. Plan well and be rewarded as your colony transforms into an imperishable, well-oiled machine.
• Choose from a multitude of power sources including coal, hydrogen, natural gas or just plain old elbow grease. Manage power runoff, circuit overloads and meltdowns to keep your colony running smoothly.
• Enter the Oxygen Overlay and watch air moving through your base in real time. Monitor carbon dioxide accumulation and oversee oxygen generation processes to mold your colony into a veritable deep-space oasis.
• Make use of every last resource for a base that truly exemplifies efficiency. Recycle waste into precious fuel, process unbreathable gas into air or harness the natural bodily processes of wild creatures for food. If you’re clever, you might even be able to run a base off colonist farts.
• Summon new worlds with a push of a button. Experience tons of untamed space rocks, then suffocate to death in them!