Based on the 1987 Games Workshop classic, a battle vs zombies cultists & time! Chainsaw Warrior: Lords of the Night sees the player fighting against hordes of Aztec Zombies, and the clock, to save reality from Darkness.
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