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.
DZ∀HQ-C4QX5-7QX∀C ;
Just replace the ∀ symbols with the normal corresponding letter.
It's a small Russian Mario-like game which also has Steam achievements. Hope it will become a little addition to your collection :)