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.
Here is a free Age of Wonders III steam key. I already own the game and I recently got an other key out of a box. QYY64-DTHML-3HPRD