1. Visit bethesda.net and sign into your Bethesda account. If you don't have an account please create one.
2. Once you're logged in, click your username on the top right of your screen and then select "Redeem code".
3. Enter your key, click "Redeem" and follow the instructions presented to download your game.
Alternatively, you can also activate the game directly from Bethesda's Launcher. Here's how:
1. Log into your account.
2. Click the options icon on the top left corner and then select "Redeem code".
3. Enter your code, click "REDEEM" and follow the instructions in your screen to install your game