Mass Effect is an action role-playing game game developed by BioWare and published by Microsoft Game Studios, originally released for the Xbox 360 in November 2007. 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. 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. The game involves completing multiple quests that generally involve space exploration, squad and vehicular combat, and interaction with non-player characters.

BioWare is a Canadian video game developer based in Edmonton, Alberta. It was founded in 1995 by newly graduated medical doctors Ray Muzyka, Greg Zeschuk and Augustine Yip, alongside Trent Oster, Brent Oster, and Marcel Zeschuk. Since 2007, the company has been owned by American publisher Electronic Arts.