Hello Uquid-ers,

After click "Reveal" to get your Key. Please follow these steps to Redeem your Key:

Step 1: Install Steam on your PC via web: https://store.steampowered.com/

Step 2: In the Account tab -> Go to View My Wallet

Step 3: Click Redeem a Steam Gift Card or Wallet Code 

Step 4: Enter the code purchased on the shop, after complete, the money will be transferred to the wallet of your Steam account to buy the game

VIDEO: https://www.youtube.com/watch?v=IZISj_sf_Mk

Redeem Link: steampowered.com/account/registerkey