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Once a Pawn a King Steam Key: Official PC Key, Instant Delivery

Yes. Every Once a Pawn a King key we sell comes from a distributor authorized by the publisher.
Open Steam, click Games, choose "Activate a Product on Steam", then paste your key. Once a Pawn a King is added to your Steam library right away.
Some keys only work in certain regions. This page shows where this Once a Pawn a King key can be activated before you buy.