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.
you can buy Noob Attack - Mech Mobility and equipt the head, but you also need to change your avatar to R6, it works best with the blocky package.