Storyline

The Mass Effect storyline has the player take the role of Commander Shepard a human military officer. Humanity has discovered faster than light (FTL) travel and can now use huge technological wonders, Mass Relays, that create a wormhole allowing for travel over vast distances. Having only recently made contact with other alien species, humanity has many foes among these new races.

After the Main Quest
Mass Effect ends after the completion of the storyline. The character is saved and may be used in a new game (or sequel). Either way a new game must be started to continue play after the final act.