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.
If you chose Minecraft then :your Person which wants to Play a World with your own Builds.
If you chose Roblox then :your a Person to start with Friends and Be simple with your Own Build.