It was designed so that the player would assume the role of a central character that could make important decisions and impact the story of the game in numerous ways. Planned as the first chapter of a trilogy from the very beginning, Mass Effect was developed over the course of three and a half years and uses the Unreal Engine 3 as a groundwork.
The game requires the player to complete multiple quests that generally involve space exploration, squad and vehicular combat, and interaction with non-player characters. The player assumes the role of Commander Shepard, an elite human soldier who must stop a rogue agent from carrying out the Reapers' galactic invasion. It is the first game in the Mass Effect series and takes place within the Milky Way galaxy in the year 2183, where civilization is threatened by a highly advanced machine race known as the Reapers.
Mass Effect is a 2007 action role-playing video game developed by BioWare and originally released for the Xbox 360.