You will need to register and be logged in in order to participate in the games on this site and to access all its functionality. However, if you just wish to browse then you need not register.
To register, choose a user name for yourself ( choose it wisely because you will not be able to change it once registered ) and give your eMail address. A temporary password will be sent to you. You will need to use it to login for the first time. Once logged on you will be able to change your password to something of your choice.