Home How to Activate your STEAM Key STEP 1: Visit https://store.steampowered.com/about/ STEP 2: Click “Install Steam” STEP 3: Once the STEAM client software is installed and has started, log in with your username / password (create one if you don’t have). STEP 4: Once logged-in click “+ Add a game” in the bottom left corner (Or use the “Games” tab in the main menu). STEP 5: Select “Activate a game on Steam…” STEP 6: A screen will ask you to accept the “Steam subscriber agreement”. Click accept. STEP 7: A window will prompt you to enter the code(STEAM Key) you purchased from us. STEP 8: Steam will authenticate your code(STEAM Key) after a few minutes. STEP 9: The game is now visible in your list. STEP 10: Click it to start a download and play.