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.
Whats the best way to unlock gems on mobile, i know to get my daily login in bonus, but i am usually on the go and only have access to a pc 3/4 days a week. Any advice?