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.
Roblox is a very diverse game, I liked it, you will find any game to your liking and the graphics are cool, but the graphics depend on the developers themselves