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.
AAA tanks or atrillery tanks are pretty good cause u can shoot from one side of map to toher one... but its boring when u fire 2 shots and u got killed by light tank.