Grab your weapon of choice, polish your Rogue senses, and get ready to be thrown into the dark and oppressing dungeons of Claustrophobia! Experience deep character development, fast-paced tactical combat, and mountains of epic loot. Here begins a roguelike quest for glory, slaughter, and anything shiny!
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