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.
Very good game, i suggest playing it. Although when I first started playing I got a bit confused and messed up... But once you get used to it u get addicted