Mass Effect 2 is an action role-playing video game developed by BioWare and published by Electronic Arts. It was released for Microsoft Windows and Xbox 360 on January 26, 2010, and for PlayStation 3 on January 18, 2011. Mass Effect 2 is the second installment of the Mass Effect series and a sequel to the original Mass Effect. The game takes place within the Milky Way galaxy during the 22nd century, where humanity is threatened by an insectoid species known as the Collectors. The player assumes the role of Commander Shepard, an elite human soldier who must construct and gain the loyalty of a diverse team in order to defeat the enemy in a suicide mission. With the use of a completed saved game of its predecessor, the player can impact the story of the game in numerous ways. 
 
 
Part 01 
Prologue 
Freedom's Progress 
 
Part 02 
Omega 
Dossier: Archangel 
Dossier: The Professor 
 
Part 03 
Dossier: The Warlord (Krogan) 
SSV Normandy SR-2 
 
Part 04 
Dossier: The Convict (Jack) 
Over the Horizon 
 
Part 05 
citadel 
 
Part 06 
Planet Mining and Anomaly (really boring, skip it) p1 
 
Part 07 
The Justicar 
Illium 
 
Part 08 
The Assassin 
Miranda Loyalty Mission 
 
Part 09 
Illium 
Collector Ship 
 
Part 10 
Dossier: Tali 
 
Part 11 
Justicar Loyalty Mission 
Jacob Loyalty Mission 
 
Part 12 
Reaper IFF 
 
Part 13 
Garrus Loyalty Mission 
Assassin Loyalty Mission 
 
Part 14 
Tali Loyalty Mission 
 
Part 15 
Krogan Loyalty Mission 
Professor Loyalty Mission 
 
Part 16 
Jack Loyalty Mission 
Legion Loyalty Mission 
 
Part 17 
Planet Mining (2 Anomaly) p2 
 
Part 18 
Sidequests (Anomaly) 
 
Part 19 
Sidequests (Anomaly) 
Last talk with crew 
 
Part 20 
Final Mission  
 
For the game, BioWare changed several gameplay elements and put further emphasis on third-person shooter aspects, including limited ammunition and regenerable health. In contrast to the exclusive focus on the main story of the original Mass Effect, the developers opted to create a plot where optional missions had as much intensity as the main mission. Mass Effect composer Jack Wall returned to compose Mass Effect 2's music, aiming for a darker and more mature sound to match the mood of the game. Mass Effect 2 also supports a variety of downloadable content packs that were released from January 2010 to May 2011. The downloadable content ranges from single in-game character outfits to entirely new plot-related missions. Notable packs include Overlord, Lair of the Shadow Broker, and Arrival. 
 
Mass Effect 2 was a commercial success and received considerable acclaim from video game publications. At the review aggregate websites GameRankings and Metacritic, the Xbox 360 version holds an average review score of 95.69% and 96 out of 100 respectively. Critics praised multiple aspects of the game, including its interactive storytelling, characterization, and combat. In contrast, some reviewers expressed concerns about the game's simplified gameplay compared to the previous game in the series. The game received numerous year-end awards, including Game of the Year at the 14th Annual Interactive Achievement Awards, and Best Game at the 2011 British Academy of Film and Television Arts Awards. A sequel, Mass Effect 3, was released in 2012.