Mass Effect

Mass Effect is a science-fiction role-playing game developed by BioWare and first released for Xbox 360 in November 2007. Set in 2183, it follows Commander Shepard, a human Alliance officer serving aboard the starship *SSV Normandy*. Humanity is a relatively recent participant in a galactic community governed from the Citadel by a council of asari, salarians, and turians. Early in the story, Shepard becomes the first human Spectre, an agent granted broad authority to act on the Council’s behalf.

The investigation begins after an attack on the human colony of Eden Prime. There, Shepard encounters forces led by Saren Arterius, a turian Spectre who has allied himself with the geth, a civilization of networked synthetic beings. A Prothean beacon gives Shepard a disturbing vision of widespread destruction. As the Normandy pursues Saren, the crew discovers that his ship, Sovereign, is itself a Reaper: one of the ancient machines responsible for periodically destroying advanced galactic civilizations.

Players can recruit companions with distinct backgrounds and abilities, including the asari researcher Liara T’Soni, the krogan mercenary Urdnot Wrex, and the quarian engineer Tali’Zorah. Missions take Shepard to locations such as Noveria, where the fate of a rachni queen rests with the player, and Feros, whose colonists are controlled by a creature called the Thorian. On Virmire, Shepard must choose whether Ashley Williams or Kaidan Alenko survives a mission against Saren’s base. Decisions involving Wrex and the Citadel Council can also alter the story’s outcome and carry into later games.

Mass Effect combines third-person shooting with character progression, equipment management, and squad commands. Its six playable classes offer different combinations of combat, technology, and biotic powers. The dialogue wheel presents choices that help shape Shepard’s personality, while Paragon and Renegade options reflect contrasting approaches to difficult situations. The M35 Mako vehicle is used to cross planetary surfaces during exploration.

The story culminates on the Citadel after Shepard follows Saren through a Prothean device called the Conduit. Sovereign attacks the station, seeking to open a route for the other Reapers. The game ends with Sovereign’s defeat, but makes clear that the wider threat remains. Mass Effect was followed by *Mass Effect 2* in 2010 and *Mass Effect 3* in 2012. The original game was also included in *Mass Effect Legendary Edition*, a 2021 collection that revised its combat, visuals, and interface alongside remastered versions of both sequels.