Mass Effect is a critically acclaimed action role-playing game developed by BioWare. Set in a rich science fiction universe, players take on the role of Commander Shepard, a human Spectre tasked with stopping an imminent threat known as the Reapers. The game offers a branching narrative with moral choices, deep character interactions, and intense combat. Mass Effect is praised for its immersive world-building, complex characters, and the impact of player decisions on the overall story, setting a new standard for narrative-driven video games.