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 have 6300 SG, I want to buy something but I'm scared that if I fall under 2500 SG there'll be some codes I can't use. So my question is if I spend my SG, will I still be able to get codes that I once had enough SG for or not?