Mass Effect 3 is a science-fiction action RPG developed by BioWare for the Xbox 360. Players assume the role of Commander Shepard, a character whose choices affect the outcome of an epic interstellar war against a nearly invincible race known as the Reapers. Combining intense third-person combat, complex narrative decisions, and extensive character customization, the game concludes the acclaimed Mass Effect trilogy with a high-stakes journey to unite a divided galaxy against a common existential threat. Multiplayer mode adds cooperative gameplay to this deep, cinematic experience.