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.
So i'm in the app making gems but my favorite thing on the app to make gems is app zone and it's not working no more it's says "you must play games to get more SG"... I don't know why this happens but if you want to help me guys drop a comment below :/.