In the year 2186, the Earth is a crippled post-apocalyptic location. The human race has been reduced to a small minority, and the only hope for the future is to find a way to send a human expedition to explore the galaxy. Your Commander Shepard must lead a team of soldiers and Marines on a daring mission to find a way to send a human expedition to explore the galaxy. Along the way, you must use your wits and your strength to survive in a hostile environment. In Mass Effect 2, you will explore the vast galaxy, fighting against enemies of all sorts. You will team up with friends to take on challenges and objectives, and use your skills to defeat the evil aliens that have ruined the galaxy.