Play games
Choose the game that interests you and play itfor free.
Complete the quests
Every game has some quests for which you will receive Soul Gems.
Receive rewards
You can exchange your Soul Gems for Steam Wallet top-ups, game keys, CS:GO Skins and other rewards.
I can think of so many problems with the website. Just one of them is them not saying where to screenshot for tasks. Do you have any problems with Gamehag?