Mass Effect Trilogy includes all three games in the series, as well as downloadable content that varies by platform.
On the PC, players will receive access to Mass Effect 1′s Bring Down the Sky and Pinnacle Station, Mass Effect 2′s Cerberus Network and Mass Effect 3′s online pass. The Xbox 360 version also offers Cerberus Network from Mass Effect 2 as well as the online pass from Mass Effect 3. DLC from Mass Effect 1 is not included.
There’s no word on what BioWare will be including in the PlayStation 3 release. The game’s release is still “TBA” on the platform.