The Community Coordinator for BioWare on Mass Effect 2, C. Priestly has announced that Mass Effect 2 will be shipping on two discs [plus an extra disc for the collectors edition]. Priestly had this to say:

Yes, there are 2 game discs for both the PC and Xbox 360 versions, both the Collector’s and standard editions.

There is a 3rd disc with the Collector’s Edition. This is a movie DvD containing making of and other bonus information.

The PC version is a standard install. You install the information from both discs and then play with 1 disc in the drive. No swapping.

You can install the game to your Xbox 360 Hard Drive as long as you have enough memory to do so and have the correct disc in the drive when you play.

Even though there is a disc swap, it occurs at a carefully planned place in the game (that does not interfere with gameplay) and is done once. You do not swap back and forth. 1 swap and then done.

Why 2 discs? Answer: Because you cannot fit this much awesomeness on one disc. Hope
this helps.

BioWare have also revealed their A-list cast of voice actors taking part in the project. The names revealed are:

Martin Sheen

 
Emmy and Golden Globe Award-winning actor. “The West Wing”, “Apocalypse Now”

 
Shohreh Aghdashloo

2009 Emmy Award-winner. “House of Saddam”

 
Seth Green
“Austin Powers”

 
Yvonne Strahovski

“Chuck”

 
Adam Baldwin
“Chuck”

 
Keith David
“Crash”

 
Michael Dorn

“Star Trek: Deep Space Nine”

 
Tricia Helfer
“Battlestar Galactica”

 
Michael Hogan

“Battlestar Galactica”

Carrie-Anne Moss

“The Matrix”

Can you say *gasp*?

Players will be able to pick up Mass Effect 2 on January 26 2010 in North America and January 29 2010 in Europe.