PLAYERUNKNOWN'S BATTLEGROUNDS | PUBG - STEAM GLOBAL

Client:

Create or Sign in to your Existing Steam account.

In the bottom left hand corner of the client is a "+ Add a game..." button, click this.

Select "Activate a product on Steam".

Paste in the product activation key you received from GMG.

After a couple of minutes Steam will authenticate the code.

Click on "Library". You should see you game in the Library.

Click on your game and select "install" to start your download.