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.
before I quit this game (due to the inferiority of my graphics card) CrossOut is Very fun. from building your own masterpiece or an abomination in the battlefield, the campaign, raid, and events are fun.