The second game takes place two years after you managed to stop the Reaper's initial invasion. You understand this threat, but the Council, perhaps the most obstinate government in fictional history, never gives you the backup you would prefer, thinking Saren's playing you. After a while, it becomes clear that Saren intends to bring in a mysterious force, called the Reapers, that wiped out an advanced race called the Protheans 50,000 years ago. After a human colony is attacked by Saren, a rogue Spectre- an elite agent of the Council (Basically the galaxy's UN)- you are appointed as the first human Spectre and ordered to go after him and his Geth allies, an AI army. Only in the past few decades have humans entered galactic affairs, but have made large advances. The plot of the first game centers on Commander Shepard, an officer in the Human Systems Alliance military. Including an animated film Mass Effect: Paragon Lost. With other media including the comic books like Mass Effect: Redemption, Incursion, Inquisition and more, and two mobile games, Mass Effect Galaxy and Infiltrator.
It spawned multiple novels such as, Mass Effect: Revelation, Mass Effect: Ascension, Mass Effect: Retribution and Mass Effect: Deception. Mass Effect is a science-fiction third-person shooter/RPG franchise developed by Bioware.