Chris Priestly, community coordinator for Bioware, has confirmed that both the Xbox 360 and PC versions of Mass Effect 2 will ship on two discs due to size issues.
According to Game Focus, he wrote the following on Bioware’s official forums:
1 – Yes, there are 2 game discs for both the PC and Xbox 360 versions, both the Collector’s and standard editions.
2 – There is a 3rd disc with the Collector’s Edition. This is a movie DvD containing making of and other bonus information.
3 – 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.
4 – 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.
5 – 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.
6 – Why 2 discs? Answer: Because you cannot fit this much awesome on one disc.
I loved Mass Effect and I eagerly await the sequel. Somehow, the idea of it being two discs makes it all the more fantastic and takes me back to my Metal Gear Solid days.
Article from Gamersyndrome.com