In order to join the natives or the outsiders, you'll need to first create an account, and then create one or more characters associated with that account. You may have up to 3 active characters that have not been donated for.
Due to spammers creating thousands of unwanted accounts, after 15 years Shartak is going invite only again. It's not been done since we were in beta and it's a shame it's come to this but I don't need the hassle of repeatedly un-blacklisting my email server. If you're a genuine user, please join us on Discord and we'll get you an invite :)