The Secret World (TSW) is an upcoming MMORPG from FunCom, who also did Anarchy Online and Age of Conan. It's currently in public beta, and a number of gaming sites are giving out keys. Alternatively you can pre-order it and gain beta access that way.
NOTE: Currently, you can pre-order the game, then change or delete your credit card details before being billed, but you still keep the pre-order items and beta access. In this way, you can try the game before actually buying it.So far the beta has only gone as far the area known as Savage Coast. In terms of previews, it would be like Tortage from Age of Conan.
Official Site:
http://www.thesecretworld.comWiki Article:
http://en.wikipedia.org/wiki/The_Secret_World