Expansions and MMOs go together like Twinkies and love handles. The nature of the genre lends itself to new content being released periodically, since unlike typical games, there is no predefined endpoint. So it’s common to expect a new update to your game every year or two.
These expansions usually grant the ability to advance your characters to higher levels, introduce new dungeons and zones to explore, and enable players to try out new spells or abilities. In some cases, you’re able to play as a new class or a new race.
On December 7th, Blizzard Entertainment is releasing its third expansion for World of Warcraft (WoW), entitled Cataclysm. While it includes many of the typical features you’d expect; there are a few potentially groundbreaking changes included as well.