Playing as a volunteer, offered to help the mad professor, you'll come to a bad dream of comatose girl Laura. Find Laura got lost in the world of dreams. Dispel girl’s nightmares. Collect the stolen and destroyed Dream catcher, defeat the Sandman and help Laura to wake up in the real world.
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