Are there alternate methods to activate Steam CD Keys?

Just recently (today), I bought a Humble Bundle and I do not have access to a PC with the Steam Client...

Is there any alternate ways to activate the keys I've got from my bundle? Like calling APIs manually or external programs? (Re-downloading and reinstalling Steam is NOT an option)

Or is it not possible whatsoever?

I remembered the Humble Bundle had automatic key redemption... But it's not there anymore as the key redemption API has been shut off.

steam

Best Answer

I just looked it up. I ended up on this article.

Important: Ensure that you are activating your game through the Steam application. The Steam website cannot be used to activate a game. If you have not yet done so, you can download and install the Steam application by clicking on the green "Install Steam Now" button here: http://store.steampowered.com/about/

So no, it's not possible to activate games without using the client.

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How do I activate a Steam CD key?

Log in to the Steam client application (if you haven't yet, you can download the Steam client here). Click the button labeled "+ Add a Game" on the bottom left on the Steam client and select "Activate a Product on Steam..." and follow the on-screen instructions.

Can you activate a Steam key on browser?

[PSA] You can now activate Steam keys from browser.

Can you activate Steam keys from other regions?

Steam has a good outline of their policies regarding regions. When redeeming a key, if there are any issues with the key and your current region, Steam would not allow you to activate. The primary thing to note is attempts to bypass restrictions (using a VPN for example) will result in a ban.

What happens if I activate a Steam key for a game I already own?

No, you can not. It will say, "product already owned" and prompt you to install it or play it. Activating keys never gave users inventory games.

Tutorial: How to activate a game cd-key on Steam

Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.

Images: Maria Orlova, cottonbro, cottonbro, Akira Deng