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.
Does anybody know if there is a time limit between gaming tasks? I was wondering because I started playing Star Trek Online today but may only complete 1 task today. I was thinking of saving the other tasks to the next time when I could earn bonus soul gems for that game. If there is a time limit my plans will go up in smoke.