Take control of the Immortal servant, Azraeus, and clear your way down into The Pit, turning dead foes into undead minions. With the coming of this Necromancer, there are now 12 playable character classes in The Pit!
Open the Steam client, login and locate the Games tab on the top menu. Click this and then select “Activate a Product on Steam…”
Enter your unique code that's displayed on the 'Orders' page of CDKeys.com and follow the prompts to activate.
Your game is now viewable in the “Library” tab and is available to download/install when you’re ready. You can find additional support for the Steam client here: https://help.steampowered.com/en/wizard/HelpWithSteam