The first game in the Mass Effect franchise, developed by BioWare and published by Microsoft Game Studios, is released, introducing players to a sci-fi universe with deep narrative and role-playing elements.
The sequel to Mass Effect continues the story of Commander Shepard, gaining critical acclaim for its storytelling and gameplay improvements.
The third installment of the original Mass Effect trilogy is released, concluding the story arc with a focus on galaxy-wide conflict.
A new entry in the Mass Effect series, Mass Effect: Andromeda, is released with a fresh story set in the Andromeda galaxy, marking a new chapter for the franchise.
A remastered compilation of the original Mass Effect trilogy is released, featuring improved graphics and gameplay enhancements.
BioWare announces development of a new Mass Effect game, signaling the continued growth and future of the franchise.
Establishment of the Citadel Council as the governing body of the Citadel civilization.
Conflict between humanity and the Turians triggered by humanity's unauthorized use of a mass relay near Shanxi system.
The discovery of ancient Prothean technology and artifacts on Mars kickstarts human interest in Prothean history.
Humans form the Systems Alliance, representing Earth and its colonies in galactic affairs.
The Mass Relay network constructed by the Protheans is discovered and reactivated, enabling faster-than-light travel across the galaxy.
Cerberus begins its operations, focusing on human advancement and survival at any cost.
Humans are accepted as full members of the Citadel Council, marking their political ascendance in galactic society.
Saren and his indoctrination by the Reapers lead to a crisis threatening galactic peace.
The Reapers attack Earth; Commander Shepard leads the defense and unites galactic forces to repel the invasion.
The Citadel researchers complete the Crucible, a device designed to stop the Reaper threat.
Depending on Commander Shepard's choices, the Reapers are stopped through destruction, synthesis, or control.
