If you cannot access the desktop app, use the official Steam Register Key page in your mobile or desktop browser. Log in, paste your key, and hit "Continue" to add the game to your account. Activating a Product on Steam
Here's how to activate a Steam key:
It is, on its surface, ugly. Unpoetic. But in your hand, it is a key. Not to a door, but to a world.
But let’s be honest. There is a shadow to this alchemy.
The application closed itself.
: Once successful, the game will be added to your library immediately for download.
