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Activating a Subnautica product code on Steam

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If you purchased Subnautica through Arc, and would like to activate it on Steam, please follow the steps below:

  1. Open the Steam client
  2. Click Add A Game in the lower-left corner followed by Activate a Product on Steam...
  3. Follow the remaining on-screen prompts to activate Subnautica on your Steam account
When Subnautica is purchased through Arc, the Steam key should be delivered to the email address registered to the Arc account.
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