How evil can you get? Discover how corruptible you are in Overlord, the twisted fantasy action adventure where you can be evil (or really evil). In the game's seriously warped fantasy world, players will become the Overlord and get first-hand experience of how absolute power corrupts absolutely.
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