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.
So far so good of course since its a free game it's gonna have micro transactions but the purchaseable ships aren't even that op and they actually balance out the stats so it's actually one of the more decent free to play games out there, would highly recomend you check it out!