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Counter Operation Online

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About Counter Operation Online

Counter Operation Online is a fast-paced competitive shooter built around quick decisions, skill and reaction speed. You can work with a team or fight alone, and it includes four Deathmatch modes.

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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