Go to: http://store.steampowered.com/ and download STEAM client Click "Install Steam" (from the upper right corner) Install and start application, login with your Account name and Password (create one if you don't have). Launch Steam and log into your Steam account. Click the Games Menu. Choose Activate a Product on Steam... Follow the onscreen instructions to complete the process. Please follow these instructions to activate a new retail purchase on Steam: After successful code verification go to the "MY GAMES" tab and start downloading. OR Download Idle Champions of the Forgotten Realms from Steam store; Go to in-game shop, press "Unlock a Locked Chest" and enter your key.