Playing Freeciv-web is free and it doesn't require creating an account. For single-player games, just choose any name. You can signup with a Google account to t

Playing Freeciv-web is free and it doesn't require creating an account. For single-player games, just choose any name. You can signup with a Google account to the "One turn per day" games, and you can sign up with an e-mail address for the Play-by-e-mail games.