What is a free online game with no email needned

Try the Zylom web-site (see related link).  They have loads of games playable on-line - without needing to register an email address.  You can register IF you choose to - or simply play as a guest - It's entirely up to you.  The only difference is - if you're a registered user, it saves your scores.
There's hundreds of games there - of different types.  Gold Rush is one of my favourites, so is Luxor.