If you were one of the good chaps who decided to back this fantastic looking game on kickstarter awhile back I have good news! You can now get your Steam key and get access to the Beta. If you are unfamiliar with what Castle Story is, or maybe you forgot because its been so damn long, here is a little video. To get the Beta you had to of backed the game during the kickstarter campaign.
To claim your key follow these not so simple instructions (its really the only way they can deliver it at the moment)
If you have already redeemed your key you can head on over to http://HumbleBundle.com/ and retrieve it.
If you have lost your humble bundle key you can use the key-resender here https://www.humblebundle.com/store/keyresender/ (this is what I had to do).
Having problems? Head on over here http://support.castlestory.net
Also for further news and information you can always head on over to their blog located here http://www.sauropodstudio.com/blog/ or visit the thriving community here http://www.CastleStoryOnline.com .
The game looks like its going to be a blast, and I look forward to playing it! Have Fun!