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FTL: Faster Than Light Steam Key: Official PC Key, Instant Delivery

Yes. Every FTL: Faster Than Light 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. FTL: Faster Than Light is added to your Steam library right away.
Some keys only work in certain regions. This page shows where this FTL: Faster Than Light key can be activated before you buy.