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Gray Goo

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About Gray Goo

Gray Goo is about stopping Goo from destroying the world. You travel through space, collect resources and buy upgrades to save the universe.

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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