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 don't understand the first task. It says that I need to complete map on level 10. I`m already level 11 and I have no idea what should I do next. Do you have any suggestions?