Age of Conan: Hyborian Adventures is a massively multiplayer online role playing game. Set in the fantasy realm of Conan the Barbarian, this massive game is being offered for free until January 1st 2010. Register, download and play before then and you will have a free account forever, although your hero will never exceed level 20.
This is a big game, and once installed you have hours and hours of gameplay, but the installation itself will also take a long time, as it's a huge 8 gigabytes.
The start of Age of Conan is fantastic, with a single player role playing tutorial section, that gives you a comprehensive introduction to playing the game. This is ten or so hours of gameplay in itself, and is a great story with high production values. Once completed, the game offers all the questing that you would expect from a role playing game.
Once you're out into the free world of Age of Conan: Hyborian Adventures can be quite daunting. The introduction guides you and gives you goals, whereas afterwards you are left to your own devices. If you can invest the time, just exploring the world is really good fun.
A free introduction to the Age of Conan: Hyborian Adventures is an excellent offer, for an impressive game. Be warned - it can soak up your time!