Mass Effect, developed by BioWare for the Xbox 360, is a sci-fi action RPG set in a vast universe teeming with alien life and interstellar intrigue. Players step into the role of Commander Shepard, a human soldier tasked with stopping a rogue agent from unleashing an ancient alien force. The game combines third-person shooter mechanics with deep role-playing elements, featuring customizable characters, rich narrative choices that impact the story, and strategic real-time combat. It's known for its epic storytelling, character development, and engaging blend of exploration and tactical gameplay.