http://en.wikipedia.org/wiki/Mass_Effect
[edit] Downloadable content
[edit] Bring Down the Sky
The first piece of downloadable content (known as DLC) was announced
on February 6, 2008. The "Bring Down The Sky" pack was released on
March 10, 2008 for the Xbox 360 as a paid download and July 29, 2008
for Windows as a free download.[12] It should also be noted that as of
late January 2009, the DLC was made compatible with the Steam version,
titled revision a. As with retail box copies, players will need to
register their Steam serial number on BioWare's website in order to
receive the serial number required for installing the DLC.[44]
"Bring Down the Sky" includes a new uncharted world that introduces
the notorious and feared batarians, a humanoid species with four eyes.
A batarian extremist group has hijacked a mobile asteroid station in
the Asgard system, setting it on a collision course with the nearby
colony world of Terra Nova. Only Commander Shepard can save the
millions of innocent civilians before the asteroid completes its
deadly descent. This mission is concurrent with the main storyline.
BioWare has stated that the adventure should take 90 minutes to
complete. The expansion also features an additional achievement
awarded upon completion of the mission titled as "Colonial Savior"
with a value of 50 points.[45] Additionally, a message may be found in
a small music outpost on the asteroid when the computer inside is read
twice. The message appears to be a humorous jab by the developers at
those who stirred up the controversies surrounding the game's romance
scenes upon its initial release.
[edit] Future content
At the New York Comic Con in February 2009, community manager Jay
Watamaniuk confirmed that a second DLC is in development. It will add
a casino and a gunfighter's arena.[46]
A documentary included with the release of the Mass Effect Platinum
hits version discussed the next downloadable content for Mass Effect.
Preston Watamaniuk went into further detail about the DLC stating:
"Things we’re working on right now, for the Mass Effect universe next
… we had something in Mass Effect 1 that again, we weren’t able to
pull off just because we didn’t have the time and we didn’t think we’d
be able to do it well enough, which was a fight club or an arena. So
we’re actually working on that for our next downloadable content piece
and we’re hoping it’ll be really special..." Casey Hudson, Project
Director For BioWare also added: "So we wanted to be able to give
people a much more combat-oriented, lighter-story experience. You’re
going to go to a kind of casino gaming fight club space station."[47]
The fact that they're are working on Mass Effect 2 doesn't lead me to
believe that there's going to be much more than the one DLC already
released.