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.
You can exchange your Soul Gems for Steam Wallet top-ups, game keys, CS:GO Skins and other rewards.
Recently with the game Eternal Fury I receive countdowns between tasks with emails like this
Countdown ended - continue playing now
Another task in Eternal Fury is ready for you!
Come back and get 26 for completing it.
Anyone know what this is about?