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.
I have been looking at it and it looks pretty highly rated and fun, but i would have to delete a game to download it. So can i get your input in the comments if i should download it or not? thanks