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Alt Oxygen

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About Alt Oxygen

Alt Oxygen is a survival game with a story. You explore different planets and interact with aliens to learn about the places you visit; their speech is translated. To survive, you collect precious stones and sell them to vendors for ALTO, which you use to buy water, oxygen, food and other necessities.

Economy and survival

The game uses an economic system in which you can sell and buy items, and multiply your money at a casino. Alongside managing these resources, you survive in a new way and follow a psychological story.

Frequently asked questions

Steam lets publishers create keys to sell in other shops. Once you activate a key, the game is yours to keep, just like a store purchase.

Disclaimer: CD keys have an inherent 1–2% average failure rate. Check the shop terms for buyer protection info. Steam offers no buyer protection for keys bought in other shops and doesn't refund them.

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