This new Sherlock Holmes game sends us to 19th Century London where Arséne Lupin, a young French burglar with an impressive track record, has just challenged Scotland Yard and the most famous of detectives - Sherlock Holmes. This new adventure offers gamers tremendous freedom and an even stronger sense of involvement through real-time 3D.
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