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.
Go in steam right click on csgo tap on properties set lauch option write -console enter.then go in game option keyboard and mouse control then search for console then set it for (O)