Sign up for the Beta here (recently they've said forum members are 10x more likely to get a key now).
Gameplay and a nice explanation:
I've just today got the Beta and I can confirm it seems incredibly solid and quite high budgeted for an indie game. The skill tree is *massive*, I really think this game is going to have legs!
P.S. Thanks to whoever pointed me to it on here.
FYI, Especially PS4 players - it's the stash tab sale weekend! You'll get about 25% off all tabs. In order of importance, here are the most cost effective specialist tabs (as mentioned, upgrade at least one of your normal tabs to premium to sell stuff unless you want to use third party software:
Currency Tab - 60 points - the daddy. Turns all your 10-stack currency into a single stack of thousands.
Divination Tab - 40 points - cards start to rack up at the end of the game