Ok so it's an MMO, that means you'll be playing along with literally thousands of other people from all over the planet.
But this is an MMORPG with a massive difference. It's Biowares first foray into MMO's and they've torn up the rule book and done their own thing. This will be a story driven MMO. You will choose a class, Jedi, Sith, Bounty Hunter, Commando, Spy, Smuggler etc. Then you will have a full story based on that profession and on your playing style. When you've finished the game you start an new proffession and it's a totally different story and different game.
This is Mass Effect gone wild. Same type of system where you interact with the NPC's and you determine the way the story goes. Written by some very well know writers including Drew Karpyshyn who wrote the best selling Darth Bane Novels and penned the Mass Effect series.
Lovers of KOTOR will be pleased to know that this game is not only KOTOR III it's III, IV , V, VI and VII according to the devs, they say that this game has the accumulated story writing of 3 times every game that Biowarware has ever produced. That is massive.
Have a look at the trailers they are epic in every sense of the word.http://www.youtube.com/v/VjhJcm-lpjc?fs=1&hl=en_US
Above is the Deceived trailer.http://www.youtube.com/v/z0RuR3FREFw?fs=1&hl=en_US
This is the latest one although still a few months old.
The game is due out after Christmas March / April time. Make no mistake that this is going to be one of the biggest gaming events ever.
Check out it's development at http://www.swtor.com