Terra Incognita ~ Chapter One: The Descendant Steam Key EUROPE
Before proceeding with Activation make sure you already download and install the Steam app.
Download and Install Steam Client from this link: https://store.steampowered.com/about
To Activate a Steam CD Key follow this:
1.Launch the Steam App
2.Login to your account
3.Click on the Game Menu
4.Select "Activate a Product on Steam"
5.Follow the on-screen instructions, then enter the Product Code
6.Click on Next and done, the Product Key is now linked to your account