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.
Parece que vai ser difícil por ter que upar até level 35, porém é muito fácil mesmo de upar... Praticamente upa sozinho.