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.
world of warships, naruto online, star conflict and crossout are the only games which reward gems for tasks. i see other games but i dont see any tasks for them. Is this only me or..?