Decimated by a force of soulless invaders, known only as the Reapers, the human race is on the brink of extinction. It is left to the player to ply influence, make alliances, and discover the galactic secrets that are the last hope of human survival. Players have the option to import saved data from both previous Mass Effect games, in order to continue their own personalized adventure narratives, or to start fresh with a new personalized iteration of Earth's last hope. Shepard adventures along with a diverse crew of specialists, also customizable by the player. Weapons can be upgraded with scopes, grips, and other looted parts.