Create your account here: http://project-ark.net/project-ark/createAccount.view
To create your account you will need the 36-digit registration key. The key is also your initial user password.
We recommend to change your password after the first login through: Mission → Settings → Account
After creating an account the application should automatically log the player into the game. If that doesn't happen please use the login form and enter the registration key as password. The exception to this rule is when an account is created before the server is opened. In this case an appropriate message will appear during a login attempt that will inform you when a server instance opens (when you will be able to login).
Login form: http://project-ark.net/project-ark/
A short tutorial for beginners on how to start running your own space empire: here
Discussion group: https://groups.google.com/forum/?hl=pl#!forum/project-ark