You are Commander Shepard, an elite human soldier who explores the galaxy on the SSV Normandy. You can choose either a male or female version of Shepard, as well as appearance and military background as well as one of several classes. Throughout the game you are able to choose various dialogue options which can change the story, as well as how other characters percieve you. Instead of the normal 'good and evil' ratings your choices earn you 'Paragon' (polite or professional military actions) or 'Renegade' (ruthless and 'gets the job done' attitude) points. In combat you can wield conventional firearms as well as biotic powers (such as throwing enemies around). Choices made in the game will impact the sequel, Mass Effect 2, should the user transfer their save across.