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.
A very dynamic and cool game I recommend playing it all you can very long, even without hesitation, you will be drawn into the game and you will play it very often to pump your tank and make money for new ones so on personal feelings I will put the game 10 out of 10 if you don't play it download this game even without thinking a very interesting game!