Mass Effect 2 is an action role-playing game developed by BioWare Edmonton, with assistance from BioWare Montreal, and published by Electronic Arts. The game is a sequel to Mass Effect, and the second game of the series. The game was released on PC and Xbox 360 in North America and India on January 26, 2010, Australia on January 28, and Europe and New Zealand on January 29. After the events of the original game, Commander Shepard is killed in an ambush by a mysterious alien species called the Collectors. Shepard is revived two years after the attack by an enigmatic organization called Cerberus, and is tasked with finding out more about the Collectors and why they are abducting entire human colonies. Many elements and locations from Mass Effect return, in addition to ones new to the series. Including familliar character and the ability to import characters from ME1.

A critical and commercial success, Mass Effect 2 had sold over two million copies worldwide within a week of release[11], and has also received highly favorable reviews[12]. It is ranked third on the Xbox 360 according to GameRankings, and is, overall, the fourteenth best reviewed game of all time[13]. The game holds several perfect scores and has an average of 94 and 96 for the PC and Xbox 360 on Metacritic respectively [14][15].