All you have to do to check out the free-to-play MMO with 22 races is go to their website and sign up for an account. That's it. It's really, really just that easy. After your account is made, you can play Earth Eternal in your browser, or you can grab the actual client and run it separate from your browser.
If you like the game and want to throw some money its way, you might want to consider doing it during the open beta. For the month of October, any game credit purchases will have an extra 20% credits thrown in for your purchase. So if you grab 1,000 credits, you'll get 1,200 instead.
So, what are you waiting for? Jump on over to the EE website and sign up. It's easy!