It's been down three times for me in the last couple of days. Currently down. "Failed to get a response from Steam authentication. Try again?"
I'm having the same issue for the last couple of days. The weird thing is, I just tried playing the game via the web client but it didn't recognition my user/password. I even tried the forgot password and forgot username but it didn't even recognize my email (I tried both email addresses I only ever use for games). Weird.
Please see the announcement here: http://forums.cardhunter.com/thread...authentication-server-preventing-login.10673/ Long story short, Steam auth servers are messed up. Hopefully back soon, email support@cardhunter.com if you want a password to login using the web client.
7 hours still broken. The funny thing is when Steam is offline I can usually login with a CH password. But not today!
This issue should be resolved now (Steam fixed their server response). Let us know if not though. If you play through Steam and haven't yet set a password, you may want to do so now. Login to the game then go to the game menu options (click the three bars in the top right of the screen and then select "options"). Enter a password which you can then use to login through the web client at http://game.cardhunter.com in case of future Steam problems.